It's one of those things that people who haven't experienced simply wouldn't know to ask for. Wii had motion aiming but it was more of a gimmick, it wasn't until playing FPS games on the first Steam Controller that I, personally, realized how much more playable and comfortable gyro aiming made these games-- coming from mouse+keyboard, I found fine-aiming challenges on thumbsticks to be very uncomfortable.

Gyro aiming completely solves both fine aiming and tracking aim on a gamepad when paired with some kind of touch sensitive control for enabling the gyro (natural recentering).

In console FPSes they just automatically track the enemy if they're near your crosshair and call it a day-- giving everyone an aimbot instead of solving the UX issue.

I've tried Gyro aiming and could not get used to it even in games where it's the 'superior' choice like my brief daliance with Splatoon.