IMO that's more of a problem with the industry not really caring to support lower specs, or generally not seeing the deck as a real console or platform to target. People still make Switch games and the damn thing was already outdated at launch and they even underclocked it for good measures.
At 800p you've got to start thinking, is most of the detail those games compute even actually visible the on screen? How many PCs does that make obsolete? If the deck can't run it at 800p, even at 1080p you're gonna need what, an RTX 2060 for the lowest settings on a PC?
Some of the example titles don't even sound like they're the kind of titles that are made to showcase what your 4090 can do, which logically you'd want as many people as possible to be able to play it.