It's not that they completely don't care , it's more of a it's not a concern if there are no complaints. Most theater chains are understaffed when it comes to projection tech's. They may have 1 or 2 techs servicing 100 plus screens and they cant spend a whole lot of time at any theater they visit. So alot of problems go unaddressed. Aperture problems seem to be the most common, and a problem that strangely doesn't get to many complaints; However, they are a major pain in the ass to correct. You have to recut and recut the aperture many times to fit the screen proberly, and then you have to readjust the lense and masking to fit the new plate if they need it. Most of the time the tech's just check the bulb, projector belts and chains ( if they have them ), the sound chain, and platter systems when they do a projector maintenance.