Yes, I would agree in an instance which was not related to pelvic size etc, it’s worth it to give a nice bitch a second chance, but if she required a second section, that would be it for me, regardless of how nice she or the puppies were. Sometimes it IS just a fluke thing. But if she had two log jams that required a section, I would assume there was something about her that was an issue and not reproduce it. JMHO
OTOH, I agree about ignorant owners waiting to long. I have run into a few that said, well, she had been in labor for two days so we finally took her in but the puppies were dead. Really? When I say rush to a C section, I encountered many breeders that would go in for a section because it had been 2 hours since the last puppy. We had that happen from time to time. If they didn’t appear in distress, I just waited them out. Sometimes we would have 3 or so, 15 to 30 min apart, then 2 hours, then 3 more 15 min apart. Who knows. I always just assumed they were moving down to get ready to exit. Like I said, if the bitch wasn’t in distress, I just waited on nature to work it out.