Because that is the switches selling point. Being able to play and then take the device on the go and continue the game. It's essentially a hybrid between a Nintendo console and a gameboy now that the handheld market is dead thanks to mobile phones. A stand alone console would defeat the entire purpose and you'd have another Wii U. I would play in handheld more if the screen was better. 720p max and most games are below that in handheld mode. Looks rough. I tend to play on the tv also so I get what you're saying, but it would ruin their entire sales gimmick. I was interested in the oled switch to see if that screen was better, and color wise it seems to be, but again, when you have games sub 720p, I don't think oled can make that look any better. I really wish the screen was 1080p but I get that at the time that would have been expensive and the battery drain would have been crazy.