If you leave it up to repair shops they will change as many parts as possible which increases the damn bill
I take offense to that remark. I could make the same blanket statement that all customers are out to lie and take advantage of honest technicians. Just like the gal who said someone told her she had a bad valve in her engine, then later denies saying that and accuses us of messing with her car.
There are plenty of shops with "mechanics" who know nothing more than to throw parts at cars. Then there are plenty of shops with "technicians" who know how to diagnose a problem, and what it takes to correct the problem. Another thing you fail to consider, is we have to put our name and reputation on it, and doing hack work by swapping out a clutch, when a compressor may be the source of the problem does nothing but give us a bad name. It should be a sign that you went thru how many clutches in that short of time, there is something else going on. There isn't anything to them, other than a bearing for the pulley, a coil for the magnet, and a clutch face. If you are seeing repeated bearing failures of a clutch, that is a sign of slippage and overheating, due to either oversized clutch gap, or excessive internal resistance of the compressor, causing slippage and heat on the clutch. Some DIY's fail to think past their nose in figuring out a pattern failure.