Aint that the truth! I have 3 engine projects going right now. Two of them were brought to me after work had already begun. Guess which is the only one that hasn't had to have corrective machining and/or major parts replacement done? It's shameful the quality of work that some shops churn out. The machine shop I use is more expensive than some others around here, but it's well worth it.
I can't imagine bolting an engine together w/o measuring EVERYTHING properly. The mentality of looking both ways before crossing a one way street applies here, lol.