I don’t think anyone really cares though. People buy Nintendo consoles for Nintendo games.
I own both. I prefer the switch to play games with my daughter. I’m also getting rid of the Steam Deck because I tend to only play casual games on it. I’ve now bought a gaming laptop (mainly for editing photos and recording music) which is a way better form factor for me. The Steam Deck is amazing though and I see how it is the perfect machine for many people.