Why more people don't run motor protectors? Is it weight? Harder to get props off? Just wondering wondered

Personally I do run them, because the extra weight is minimal as, and it's annoying to replace motors.
Also, it's hard to grab the motor bell with them on to change props.

Personally I rarely break a motor, they are just plain tough. Maybe if I flew over concrete more often I would use them, but my- err.. creative landing.. usually involves trees branches, grass and dirt.

Weight is the main reason I would think. Every little bit counts and motor protectors are x4.
Ill keep mine on for now as I am still gaining confidence practicing and for freestyle, but once I actually enter a real race I would take them off just for that little extra edge
Just my 2 cents