Depends on whether you do "nice work" or not. Having an old timer tell you as a kid that you do nice work meant a lot . Also the 7 setups....there are tricks one learns that would make most if the issue with that go away. A mandrel that would slide into a bored hole under the part and have a center for the tailstock on the other end would line it up the 7 times quite nicely .
I have watched plenty of folks run a tap in "way off" .
Bill