I thought similarly until I tried it out. There’s community control schemes you can copy for games, plus there’s 4 extra buttons in the back you can quick remap them to either keyboard/mouse buttons or controller inputs, along with two click touchpads that can do that and more. Plus you can quick call a touch/navigatable keyboard to the screen. It takes a bit to get used to but once you do, it’s hard going back. I actually ended up preferring using it handheld over using a dock to hook it to a TV with a controller paired to it.

The only games I’d say are hard to use would be like some mmorpg games that are best for keyboard & mouse.