If you want to become a climbing gym-supplying tycoon and fix this problem, invent a new connector for holds based on a carabiner's autolock. You could pop the hold into a pre-set receptacle and it could spring closed, and a special tool could go into the bolthole to release the spring lock and pop the hold off the wall. No more re-tightening + faster route setting, and based on existing technology. Would probably cost the same as this special bolt, but provides enough extra features that a gym might rationalize the price.