I think you’ve convinced me it makes sense for the right person. Especially if it’s the only device you carry around.
I don’t game on my phone apart from some really simple ones like Minesweeper and Flow Free. Everything else I do is just reading, which I have no problem doing on my Galaxy S10’s screen. I never even considered that something like RCT or RuneScape could run on a phone now. All my serious gaming happens on a desktop or my Steam Deck.