glad to hear this. 
I think that is his honest reply.
they may be worried not that they did something wrong, but that you would file a suit or complaint, which surely somehow bother them even if they did nothing wrong, as you intent.
I think that kind of complaints may not be rare for their departments. Though pregnancy and delivery are highly dengarous and mothers and babies could die without anyone’s fault or negligence, many people expect no negative outcom but the happiest moment. So, when something went wrong, it must be hard to accept, and people may tend to think doctors did something wrong.