why do some dislike clutches?

[mk351e]

should have mentioned that I WILL be using mechanical brakes for this setup, not the motor. My only reason for wanting to use the clutch is simply to take the stress of shock from a landing off the motor, nothing else really. I do agree with everything said so far about the clutch adding stress to the system b/c of weight, etc., but what about the shock to the driveline during a landing?? Can't be good for the motor, no?