Especially since this is her first litter. She's a new, inexperienced mom. She's likely to make mistakes here and there — a baby monitor is just a little safety net.This I agree with. I can provide an example of "when things go wrong".
We purchased a bloodhound pup from a friend who owns both parent dogs.
Mom dog is big at 115#. There were 12 in that litter.
Well in the middle of the night she accidentally stepped on a little male breaking his leg and of course he was crying out. That set mom to moving around A LOT.
Due to a baby monitor the owners were able to quickly step in. No telling how bad things could have gone without that monitor.