If you're at a large race and you're walking up to tech you'd better know you're in blinky mode. This reason alone is why the race organizers have asked for the change. They do not want the timing profile to be that easy to alter on the fly.

Rumors and accusations of racers doing this after they've gone through tech while waiting in line changing the profile has already happened.

This feature will prevent that possibility.

Besides the actual convenience there's no reason that I can think of that this is bad for R/C Racing.