The generational character of consoles has never been questioned, never, the PC comparison is therefore nonsense.
Pro consoles are just that, stronger versions of the current console gen, just like it has been with the last Pro models. So again: as long as there is nothing like "Pro exclusives" you have no argument.
And the "being left behind....not wanting to age" .....That's just you blaming the world for you lacking impulse control aka "FOMO".
As long as full compatibility of all games is a given none of the issues you describe actually exist outside your head.
So my question is still the same:
Who would actually force you to buy a pro console when all games run on all consoles?