The uterus is capable of expelling the baby on it's own in the majority of births without making it an athletic event with cheerleaders on the sidelines telling the mom how to do it, but ONLY if it's allowed to in it's own time. That's just one anecdotal example. Also of note the fht were excellent all the way through and when the waters broke they were crystal clear. I was able to avoid drugs, episiotomy or any type of mechanical assistance and push my baby out on my own. Of course they stepped up the frequency of doptone 'monitoring' and encouraged me like the dickens.
Maternal attitude going into the pregnancy and labor has a lot of do with it.
I was internally motivated to birth my baby without medical interventions. But if a woman wants to have her birth managed for her, then absolutely she should be in a hospital. Also, IMO, the attendant's attitude toward the whole thing can work wonders. People who plan to birth at home do things a little differently than people who know in the backs of their minds that the machines and knives are close at hand. Truly believing in your body's ability to birth without medical assistance goes a long way in making it happen.