> That is not ignoring but announcing a delay.
I think maybe with the American PoV of "the customer is always right", that might basically feel like a slap and the face and being ignored. Of course, we should understand that every human needs to rest during the year, but if you don't have that opportunity yourself by law, maybe you're less knowing about that being a thing in other more modern countries?
In America we generally ensure there are multiple people who can do the job. Somebody can go on vacation no nobody will know because the backup is just as good.
Every once in a while there is an exception. Then that guy says "If your sending me to Australia I'm going to use my vacation to scuba drive the Great Barrier Reef" - and his body is never found. True story, it took months for someone else to figure out everything that guy knew.