I think it depends which ob you speak to.

Two of my sisters had c-sections, partly attributed to it being hard to get a fair sized baby through their small pelvises. I discussed this with one ob, wondering whether I should opt to have a c-section - she rejected that idea, saying that she would always give priority to natural birth unless there was a clear medical reason not to. I delivered that baby naturally, with the help of epidural, vacuum extraction to help his head move through the birth canal and episiotimy to help his shoulder to squeeze through.