“I’m sorry” is just good manners, like when you lose a loved one or something bad happens to you even if you are to blame, polite people say “I’m sorry.” It is not in every context any kind of admission of guilt. Granted the political serial apologizers are frustrating. But that does not mean we throw the baby out with the bathwater — good manners still matter.
LOL
So it was bad manners not to apologize for the mailing?
Unfortunately for all, its just politics as usual.