This is only my opinion, but we live in such a litigious society that many businesses almost routinely refuse to issue formal apologies anymore, because they are sure to be sued! In fact, as a relative of several legal experts, I myself have been advised never to apologize for any error I might commit in the course of my career..........not because of any risk to my license, necessarily, but to protect my family from being bankrupted by a civil action.
It's a sad commentary on our times when being honest and admitting mistakes can literally cost one his or her livelihood, but one would have to be totally naive NOT to be afraid of the possibility. Hospitals and other health care institutions know this, and thus even when they are grievously wrong, they have to act as if everything is fine. "Deny, deny, deny" is the watchword.