I take the opposite tack: if you can't heel/toe, you either should be learning or you shouldn't be driving a manual.
It's fun to learn, it helps you feel more connected to the car, and it's an excellent feeling when you get it right shift after shift. Relying on SRM also means you won't be able to shift properly in a car without it.
Yeah, I know, I'm an ornery f**k.
