His comment makes perfect sense. You're just blatantly modifying the definition of professional to suit your argument.
And no offense, but if the basis of your argument on Apple making design decisions, is to reference a man who uses a machine from the 80's to do his "professional" work, then you've pretty much helped me make my argument that "new" is not always "innovative".
My issue is that what constituted "professional" before 2012, is not what Apple constitutes it now. They believed that the type of professional who would need a MacBook "Pro", was someone who needed a discrete GPU, the ability to upgrade their ram and hard drive and lots of port accessibility. You say that you know professionals using DOS.
That's fine. I'm an engineer and I don't. My friends develop software, games, edit photographs. They like power and mobility but they like those to be equally inclusive. If you want an emphasis on mobility, why would you pay $2000 for a 15" laptop? You wouldn't. You would be a 13" Pro, or the 13" Air if you wanted even lighter and now the 12" MBr if you want EVEN lighter with a better screen.
A person who values mobility has FOUR choices for MacBook models that are lighter, more battery life, more mobile, thinner and sleeker than the 15". And yet, the owner of the 15" who LIKES discrete GPU's, who likes more memory, who likes to be able to "buy now, fix up later". Who only needs battery life maybe one day out of the week or even two days out of the week. The one who likes their MacBook PRO to be a professional grade notebook that they can take with them as a desktop replacement/mobile workstation. That person is having their notebook turned into some Frankenstein 15" MacBook Air.
THAT is what bothers me. I no longer own a 15" Retina because I hated how compromised it was. I loved the screen. I loved the colors and the feel of the keyboard. I loved everything about that machine except that it wasn't a 15" to me. It felt like an oversized MacBook Air with a higher resolution screen.
What bothers me is that Apple is changing these notebooks despite the fact that they don't have to. And you're all fanning their fires.
I understand what you are trying to say, but I think you have made some fundamental errors in your assumptions.
First off, your continuing mis-use of the word 'professional' as a stick with which to beat Apple. You seem (in this post) to be associating its meaning with Apple's own branding - i.e. the 2012 reference. There are only two meanings for 'professional', one now somewhat archaic. A professional used to mean someone with certain qualifications and credentials that were recognised by the state and within those designated professions. That tended to mean medical doctors, lawyers, accountants, teachers, priests - and yes, engineers. In many countries, these were the only people permitted to sign one's passport application (for example) as a recognised member of the community. This meaning still has connotations, and Apple used that 'memory' as part of their marketing of a 'pro' line.
For many years however, 'professional' has returned to its original meaning of someone who earns a living at what they do. In other words, not an amateur. This applies to all activities, if working at that activity is paid. Sport is now largely 'professional' whereas pre-war, a professional sportsman was considered rather infra dig. In marketing, 'professional' has acquired a link with this latter meaning as a differentiator, in the same manner as 'executive'. It's even more meaningless as a definition of capability or quality.
Terminology is important if one wishes to establish an argument based on a particular word use. As others have noted, your argument is reaching for conclusions based on a fairly narrow use of 'professional' biased towards your own perspective.
Lastly, you make the same error as many who rail against Apple for its decisions. You seem to think that one of the most successful marketing companies ever seen does not conduct comprehensive market testing of every product long before it reaches production. I find it really quite odd that you think they haven't covered every single one of your objections a long time ago, subjecting the product to all manner of tests in the marketplace. The reasons I know that they do this is a) any business that survives more than a month, even a local window cleaner, does market research; and b) Apple is the most profitable company on the planet, so the market rather rewards their research with money (in a highly competitive marketplace with a huge amount of choice).
I completely understand that the MacBook is not for you and does not suit many others. It is good to read others' more skeptical views, but in relation to their own case need, not as some sort of admonition to Apple. I am in two minds myself - because I run a very substantial organisation, and whilst I need the portability (international loci) and I know the computer will run the Excel spreadsheets and allow me to write and research - my two key requirements of any computer - I am not yet sure of how the keyboard will suit my needs. The screen (big plus, I expect) and the keyboard (don't yet know) will determine my decision to change from my 11" Air.
My needs are not other people's needs. Had I been part of the market research programme for Apple's MacBook, I would probably have given it positive feedback. I'm a professional in both senses of the word referenced above. I don't need my computer to have the word Pro written on it to achieve my own goals.