You're specifically asking about Nintendo so I'll give you that.
I don't play on Nintendo this generation because I don't like the Switch. I am a gamer that goes for dedicated home consoles, it's just who I am. Others love portables, others do phones etc. Me, I go for dedicated home systems as the hybrid concept does not work for me. I'm not sure why nobody seems to want a dedicated home console from Nintendo as Nintendo's entire gaming history since the NES has had dedicated home systems.
So it is what it is and in the end my returning to Nintendo is entirely up to NIntendo and their willingness to do home systems. So to answer your questions the games are not the issue here for me, it's the hardware.
That’s kind of a weird reason. Not saying you need buy a switch or anything... but it can really be whatever you want it to be... My switch never really leaves its dock, because like you I much prefer a home console to a handheld. It isn’t like they are making mobile games for it either, these are full fledged Nintendo games...