If you are doing security work, why are you worried about them taking ukemi?
Because I want them to be controlled as thoroughly and safely as possible. I do eventually have to let them up and sometimes I have to explain to the nice judge why I tore the tendons in someone's wrist or faceplanted a guy in the parking lot.
Because I actually am a nice person who needs to make mortgage. The engineering degree is apparently useless in my area, so I may as well pimp out my black belt.
Because I would like to represent my art well and fairly.