Or maybe people simply can't finish a long-ass (bloated) game like Persona 5 and think that portability would really help.
Lord knows that's my case.
That's pretty much the boat I'm in. I've got a gaming PC and a Switch and lately I've pretty much regulated my gaming PC to shorter games (<30 hours) and games that can be played over and over (DOTA, Civilization, etc . . .).
I've been so tempted to pick up Dragon Quest XI on PC as it's one of my favorite series, but I really want to experience everything the game has to offer and I can't help but feel I'd get partway through it on PC and I'd be too busy to sit down at my PC in finish it, eventually causing a loss of interest. Switch is much better suited to short sessions and makes longer games easier to stomach.