Might've worded it poorly. Just meant that a game running at 60fps is always better than that same game running at 30fps. In the worst case scenario, they're the same game.

Not always better. A 30 fps game that you can play twice or three times as long before having to recharge the battery may be better.

Depends, some might be willing to make that trade. I think most consoles are making that option of performance or visuals these days. As an option, letting the user choose seems to be more the norm these days.

If i'm playing plugged in I would want better visuals (as the switch allows with the dock) the primary reason being more power available.