Squat birthing is a nice idea, but you have to look at the evidence, it's good for some things and maybe not great for other things like cesarean (RR 2.26 in this meta analysis)
https://www.sciencedirect.com/science/article/pii/S030121152...
https://www.sciencedirect.com/science/article/pii/S030121152...
I would also recommend to let the soon-to-be-mother decide how she feels about squatting? You don't read evidence what's the best positure for shitting when you need to shit like hell. I promise you will take up the best positure for your shit.
Also there is more to childbirth than a new life as there is an already existing life it very much affect - the one who's giving birth and I see no such consideration in the linked evidence.
The study wasn't about the mental well being of the mother & birthing method, I'm sure you can find some literature on that (but it's not a valid criticism of the study methods).