In the interests of balance, I should probably post a bit more from the AMA thread. I found it a really informative thread, BTW.
I am extremely pro-vaginal birth, as a straightforward, term, spontaneous vaginal delivery is the safest option overall. The problem is that this is a retrospective diagnosis - not all vaginal births are straightforward, and you cannot predict which ones will or won’t (risk factors are meaningless in an individual basis). Some complications are life-threatening or catastrophic, but thankfully rare. Things we do to try and avoid these can cause more harm than good on an individual basis, but improve the outcome of a population.
eg: we induce by 14 days after due date, because rate of stillbirth goes up sharply at that stage if undelivered. Induction is more likely to end in intervention, so more women will end up with assisted deliveries or emergency sections than if not induced. But their babies have a higher chance of being alive!
Vaginal birth definitely not cheapest option due to need for emergency 24h care and intervention. Cheapest probably planned C/S for all, but no one would recommend that.
Yes, any vaginal birth has a more possible complications for baby than a C/S - distress, failure to progress, delivery problems (shoulder dystocia, assisted delivery). Better for their lungs though!
....
Heartease - see my posts of this evening - vaginal delivery riskier for baby at a population level, but not on an individual level - as you don’t know what your outcome will be with vaginal delivery.
C/S has different and some serious risks, especially for the mother, and risk goes up some with each subsequent procedure.
When I did obstetrics, I DID tell women this! But also pointed out that it was meaningless for them unless they had access to a crystal ball.