What kind of dimwit would buy a game that needs a controller to use, only to play it on a tiny screen? Surely the only advantage of the phone is the ability to play games on the go? Unless your pockets are large enough for a controller too, it makes no sense.
Edit: Plus, reviews of Resident Evil Village on the iPhone said the controller experience was also a laggy mess when they tried it.
I don't know, I think if I was serious about playing AAA games on my phone I'd buy something like a Backbone One and move on with my life. I'm not even convinced that trying to include touchscreen controls is even the right approach for these kinds of games.