In my experience, what often happens is that telling them the reason often results in a repeat of the same behavior, but modified only minimally in an attempt to avoid violating the letter of the rules, but not necessarily the spirit of them. This leads to a constant back and forth and is exhausting to the community and moderators.
Sometimes you just have to show boorish guests the door.
Well, you sorta posted this on a submission about a paper that indicates the opposite; telling people why something was removed leads to less content being removed and other issues, so I think that might be more of a perceptual bias rather than reality.
Then you've encountered much nicer mods than I have. My initial questions into my banning were more often than not met by a boorish mod hurling insults, even though I always kept it civil. There's plenty of subreddits putting this type of bad mod behavior on display, so I know I wasn't the only one. In fact, bad mods were so prevalent when I left, it was a daily running joke in a lot of communities.
Sometimes you just have to show boorish guests the door.