@Kelly149 Yes! It's almost like it's ingrained in us! We apologize way too much for things we shouldn't. One day I saw a list of things to say instead of "I'm sorry" and make a conscious effort to do that. Most of the alternative responses are to say, "Thank you for....." and then whatever.
@Inna22 The guest WAS out of line for complaining that you didn't say "sorry." That is ridiculous and petty!
But........As a host, I do feel a certain responsibility for making sure my guest has a wonderful experience and even though the blocked car wouldn't be my fault, I would have said something to the effect of, "I'm so sorry that happened to you! Let me see what I can do to help you." That's not acknowledging fault, but simply expressing you empathize with her for the unpleasant thing that happened beyond your control.
Also, knowing what I know about you from the CC, you seem to be a matter of fact type person so while you saw it as just doing your job, guests might interpret it differently. Sometimes I come off that way too. Not trying to be rude, just being straight and to the point, haha!