So all professionals need high horsepower machines? There are no professional authors? All professionals need three rear facing camera phones? All professionals need noise cancelling earphones? And these things are exclusively for professional use right?
There are obviously lots of different professions that have wide ranging requirements.
The stance of "it doesn't exactly fit my professional needs, therefore it cannot be used in any professional capacity" is absurdly short sighted. But again, it's very obviously just a marketing term. Not obvious enough though I suppose.
Of course "Pro" doesn't necessarily mean "for people that use computers for a living", or in their professional life. That would be asinine. Pretty much every professional uses a computer is some fashion and computer needs for those jobs are almost as diverse as the jobs themselves.
Despite what some of the recent discussion has evolved into in this thread, the added "Pro" on Apple devices has always been there to distinguish multiple options and signify the one with the higher performance and/or larger number of supported features. In computers, this has always been clear. MacBooks and MacBook Airs were lower power/performance devises. The MacBook Pro was a significant step up in computing power. This is true of the Mac, with the Mac Mini, iMac, Mac Pro and iMac Pro. Specifically, for Apple's desktop line, its meant Xeon class CPUs and ECC RAM. If Apple wants to make a top end, performance laptop, Xeon and ECC is now possible.
But hey, don't let me get in the way of you railing against the use of "Pro" term in a computer to somehow means professionals without high demand compute needs don't exist...
I can absolutely understand that many users prefer a "weaker" (not meant dismissively) machine with a larger screen, but I also think that there is a certain danger of spec inflation here. This kind of user attitude allows chip manufacturers and OEMs to put premium prices on lower-powered hardware, making high-end hardware even more expensive and less accessible. This is already happening in the Windows world. The low-power 15W CPUs are now a standard sight in the premium laptop segment. Today, you pay much more to get the same relative level of performance than just couple of years ago. Intel now charges top $$$ for a CPU that is less capable for heavy-duty work. All this makes the higher-powered CPU configurations less accessible, which is a problem for many users that can benefit from that performance.
I definitely understand that. A MacBook Air 15" (or 14), would need to be placed carefully and I'd certainly only like to see it if it meant the Pro line price range was unaffected. But you are right, Apple would probably use it as an excuse to move the Pro line up a few hundred bucks.