The Nintendo Switch 2 streaming services talk in a nutshell
I obviously don't want this and people like me and you have listed plenty of cons or reasons why it shouldn't happen, but it makes sense why these niche communities exist.
There are certain people who love the architecture of their console. That's even the same reason why homebrew communities exist across every console. Why would someone install an app or fan game or on their SEGA Dreamcast that they can play on their phone, PC, etc. same reason as my first sentence.
The same thing can be said about media fans on retail consoles. The architecture, specs, nostalgia, etc. of the console are quite important to them. Why would someone install an existing app on their Switch 2 that they can play on their phone, PC, etc. same reason as before.
This isn't the same thing as saying console devs are obligated to give you an all in one experience, they aren't obviously, but that's not the point.
There really is no obligation for companies, they don't owe you anything, that's basic information.
The real point is if someone has an opinion that they want streaming stuff on retail consoles, that's completely fair, they can have that opinion.