There's a difference between a technician doing the work and the average pinball collector doing the work as well.

I know when I remove a snap cap from a driver board, there's a chance I'm going to damage a trace. Even if it looks good.

So, I know what jumpers to run, what traces to check, etc.

I don't replace nearly as much as you do, new parts fail too, but to each his own. The only thing I shotgun anymore are DMD high voltage sections :)