Few venues hire a "good" sound man because he is just that. They (and most bands) hire a sound company usually for a combination of price/reliability/availability, not necessarily their mixing skills.
Some sound men are like lemmings when it comes to getting a bass sound... they just blindly reach for the DI every time. Again, going back to the Mic vs DI; there are those that automatically grab some cheap-ass DI or start looking for the DI out on the amp. They are just flabbergasted that I pull out my own mic! On one occasion it got down right confrontational! He told me if I didn't use his cheap-ass DI (a old Whirlwind from the 70's that rattled when handled) he would not put me in the mix! I said "Fine, I'll just turn my Ampeg SVT up louder then... doesn't matter to me!" He eventually, but begrudgingly, plugged my mic in. It was at that point he wanted me to play at a 10 watt bedroom practice level!
One of the issues, of course, is good "sound". I am not concerned with that for this discussion... being subjective as it is. However, when I play I initially verify my rig is dead quiet from bass to amp with everything in between... when attempts to use a DI result in any sort of noise (whether it be a 60 Hz ground loop, dimmer pack noise, etc) I will insist on using a mic if after a few attempts at reversing ground lift or polarity switches the noise does not dissipate. Why would any soundman (good or bad) prefer noise in the PA system over using a microphone at that point? It's not like obtaining good results are difficult or that one more open mic on stage takes the mix beyond some mystical threshold.
This was the reason I insisted on a mic in my example above. We tried his DI and the noise level was higher than my signal level. He actually began using that for FOH levels! I suggested trying out my two DI... one in the pedal board (quieter, but still injected some noise) and another between amp and speaker (which he wouldn't even try because he was afraid it would damage the PA system and didn't want to be responsible... this is when I found out he was just a cheap operator sub-contracted by the PA owner). I later talked to the actual owner who stated he never DI's in that room because of the noise!
Sound men, like musicians, also need to learn the art of negotiation and compromise. I love my SVT, but also know it is not the best amp for every occasion... and have several other rigs to choose from that I try to be appropriate for the room/stage/audience.
Sometimes just the vocals and kick drum in the PA is a good thing. Sometimes the audience actually enjoys hearing a band playing/sounding like a real 3-dimensional band, not the 2-dimensional band the sound man wants to create.