Yes, and no.
I had a cesarean for a baby in a transverse lie. When we went to the hospital to attempt ECV, all the fluid had leaked out and there was nothing left to turn him in. So, under those circumstances, yes, I think it was necessary.
HOWEVER, I really, really, really wish my midwife had done somethng to verify his position during those last two months of appointments other than nonchalantly commenting things like, "Hmmmmmmm.... I can't quite seem to tell where this baby's head is... I think he may be sideways, but I'm not sure..." and then at other appointments "Hmmmm.... I'm not exactly sure, but I think I feel a head down in the pelvis, maybe..." Perhaps if she had been a little more agressive in finding that out, I could have attempted the ECV earlier, or done excercises to turn him head down, or whatever. So, in the sense that a few months is often plenty of time to get a transverse baby flipped, no, I don't think my cesarean was necessary.
Does that make sense?