Did you refuse to play on any other system than a Playstation because the controller was different?
Because I grew up playing my PS1, PS2, Gamecube, and Wii... and a computer. I have to stop using one control scheme and switch to another for every single game. In Okami, the main attack button is square and in Kingdom Hearts it's X, and those are on the same controller. So, like... how is swapping from clicking to keybinding or the other way around any different? Just get used to your new controller. :T
Just my opinion on it. I went from clicking to hybrid between clicking and keyboard to just keybinds to advanced keybinds (modifier macros and shift+1 being an ability on top of 1 to mouse buttons bound to keys and modified mouse buttons bound to keys) pretty easily, myself.
I'm not saying that this is what you're doing, but from what I can see, when people don't want to switch from clicking to keybinding, it's, like, a pride thing. "How dare you accuse me of not playing as well as you! I'm going to keep clicking just to spite you!" or something like that. And, well, my boyfriend clicked to heal (without grid/click) for years and he did just fine, but then he switched to keybinding when he needed to and he didn't throw a fit about it. It was just like getting used to your Gamecube controller after playing exclusively on Playstation systems.