Well I fell you are wrong, as I think compared to most here, I'm optimistic about games or anything. I also don't think its pessimistic to think the current Switch is fine and that the next Switch should be an actual Switch 2. 3rd Parties are going to leave the Switch eventually and a Switch Pro is not really going to help run PS5 level games anyway. Games made for the Switch are also not lacking. Outside of the One X(and not because of anything MS did) these upgraded consoles have been whatever for me. Do I like the PS4 Pro? Sure. Would it have been a big deal if it did'nt happen? Not really.
"Why would anyone want an obviously superior console even if it only offers nominal benefits over their current one?" Gee I dunno, companies have only been doing it for 20 years, maybe they have something figured out?
Obviously superior? Eh, not really when it comes to these incremental upgrades. Pretty much every conversation involving them will include:
"Well should I spring the extra money for the Pro version?"
"I don't know, should you? What games are you going to play"
"Mario"
"Eh then no, Mario will be fine on the regular Switch"
And these conversations happen all the time in regards to these "upgrades". It's not super clear. Also i feel like you missed the entire point, as I said just do a Switch 2 instead. I do not see the value of a Switch Pro when a Switch 2 would be far more interesting. I also belive a Switch 2 would have BC and whatever improvements a Switch Pro could do to the library, would apply to a Switch 2.