I'm not even particularly pro home birth, but there are aspects that get overlooked by people
A) The threshold for transferring to hospital is very low. Far lower than the emergency situations in hospital that people tend to compare this with. Chances are the mother would have been transferred long before that.
B) Monitoring by the midwife is crucial and one advantage of a home birth is that you have one midwife (at least), entirely focused on you. That's not necessarily true of hospital births and the most catastrophic birth outcome I am aware of personally, was a result of over stretched midwives not monitoring the mother sufficiently on the hospital ward.
C) It may be that giving birth in hospital increases interventions, which, in turn increases likelihood of poor outcomes. Here, I'm on less solid ground as I think this is hard to accurately measure. But I take the point.
Then all of this needs to be considered in relation to what happens of things go wrong, distance to hospital, etc, etc. The risks need to be weighed up in every individual case.
Personally, I was not even close to being a candidate for a home birth, so it wasn't an option for me and I think all women should be sensible in the choices they make.
However, for a low risk, second time mother, home birthing outcomes are (better?) at least in a par with hospital outcomes, so that feels like a very legitimate choice to me, assuming the home is within reasonable distance to the hospital.