You know, the more I read about all this 'pro' stuff, the more confused I get. For some people, apparently 'pro' means having a fast gaming graphics card. For others, it means having situational ports. For me, 'pro' means having a machine that allows me to do my work without annoyances or distractions.
If I want to be rude, I'd say that for some people here, "pro" also means "something I can afford." But you're right, a lot of people have their own views of 'pro' machines. And it's clear that this is all part of a bigger problem people have with Apple. However, that doesn't mean those people are right and that they are the ones to determine the professional status of gear and usage.
In reality - there isn't such a thing as a "pro" device. Devices cannot be professionals, people can. And people use various tools for various jobs. There are certain professions, very demanding too, that favor mobility over performance, for example. Others require performance that is beyond any mobile device. Some require very specialized hardware, others require a pencil and a sheet of paper.
What most people here mean by "pro" here is "to have everything I want it to have". In a way, this is self-flattering, because we all assume that our needs are the ones that define what is pro. I could argue that if some fashion designer needed their computer to match the color of their latest collection because it is an element of the image they are building as part of their profession, the color of the computer becomes a "pro requirement". Imagine a couple of fashion designers criticizing the latest MacBook Pros because they don't come in gold color

It may seem funny, but in reality, this can be as good an argument as the lack of 32Gb RAM for some.
In reality - Apple made a computer they consider to be the answer for a lot of people who need a good laptop. Like any piece of equipment it is not for everyone. But it's easy for people with different grievances to unite against a product. There are a lot of posts here that claim Microsoft is the one who is making professional computers now with the Surface line. I would agree that Surface computers can be used by many pros, and that some may prefer them to anything else. But no one is criticizing the Surface Pros and Books of having only dual-core CPUs and also being limited to 16Gb RAM. Others claim that Razor computers are true pro devices because they have great GPUs - but no one is criticizing them for having short battery life. Everyone mostly agrees that they don't need thinner (meaning: lighter) laptops, and yet everyone seems to have a problem with carrying a few adapters in the bag.
As you noticed, the criticism of the new MBPs is contradictory at best and just ignorant at worst. Reality is - The new MacBook Pro is a fantastic feat of engineering that may not serve some people's needs, but will perfectly suit others. It is not a computer for every profession, but it is a computer for a lot of professions. And a great one, too. If anything, that gives it the right to be called a 'pro device'. Whether this is a pro device suitable for a specific person, that's a different question. Some professionals can't use it in their work, but that doesn't mean the device itself is not 'pro'. The same way, say, a violin or a piano is a pro "device", even if I can't use it for my work. At all.
What I find arrogant is the fact that some people think their needs are, somehow, objective measurements of quality.