Yes? The Pro is fundamentally a PS4, with the limitations that the base presents.
As others have said in another context - 'imagine games using something like X as a baseline, without being tethered to the base Xbox One'. Of course without being tied to the lower level skus, that would be a bump over what we have now.
But as good a bump for the whole generation, compared to a higher baseline from the start? Hmm.
I'm not sure why we can't have a higher baseline from the get-go, and a better 'Pro' version later. If Sony goes for that strategy and releases a Pro 3 years down the line, will MS sit still with Anaconda? If they do sit still, Sony will have both a higher baseline and the more powerful high end system. If they don't, and release a third system, I think it might betray the expectations of people buying Anaconda.
I can understand why MS would take the approach that's being rumoured, they have to try something different than a conventional head-on approach to PS5 I think. But this strategy isn't without some downsides and question marks.
Of course there are games that are doable on Switch. But if this gen had started with Switch around from the start, and devs used Switch as their baseline through the generation, a lot of games would be quite different to what we get today.