Right, because unless something is heavy as a brick and also a size of a suitcase, it can't be considered a professional tool. Sure, the MBP is a thin and light bathroom laptop, but it also happens to host the fastest CPU available on the laptop market at the moment (and can provide serious performance for hours without any throttling).
I find it rather hilarious that people's brains start shutting down when something is "thin and light". A computer can be thin, light, powerful AND have great battery life. If you consider a computer like this a screw up, you have never been the target audience of Apple.
I think we can just say that some professional users would rather maximize a different variable than form factor. Sure a "thin and light" human can be a powerful weight lifter, but we all know that at higher weight classes, the lifters become more powerful. I can accept your definition but I can also accept other definitions of the word "pro". I suspect when Apple finally announces their new Mac Pros, this contentious issue may lessen. Given Apple's recent decisions to go back to the drawing board for the Mac Pro, Mac Mini and created the iMac Pro, I would say that Apple may just eventually cater to the "higher weight classes".
I understand what you are saying regarding - if one does not find the Macbook Pros to be sufficient for their usage, then Apple is not the right company for one's needs. In my interpretation, what Apple decides to do, is the status quo for the MacOS ecosystem. However, in context of a democratic society, I think we can all voice our own opinions. I would like to believe that Apple cares about the opinions of its users, all of its users, not just those who are already satisfied. In that view, I find it perfectly reasonable for previous, current and future users of Apple products to discuss their perspectives of the word "pro", such as on this website. I would think that the new upcoming Mac Pro, Mac Mini and the current iMac Pro are indications that Apple is listening and there is a loud enough collective voice.
While I personally for many reasons would not want the new Macbook Pros (I do not have any USB-C devices, I work in a dusty environment, I am very happy with my present Macbook Pro, etc), I can see that the new Macbook Pros are well received by many. To them, I hope Apple keeps the form factor alive. To others, I would like to see an option for something a bit more workstation-esque. For me personally, I would rather see a company like Apple serve my needs, because of their creativity, strive for integrity (although many argue otherwise), attention to detail and actual considerations for their users. Purchasing anything HP, Lenovo or Microsoft for example, has always made me feel guilty in some way because of their corporate histories.
Oh and by the way, I've always used my Macbook Pros as bathroom machines. I also use them for serious scientific work. I just wash my hands in between.
