My interpretation of this is most people don't intend to break the community's rules. That is to say, most people aren't sociopathic trolls.
Most people don't want their posts removed. Informing them of what rules they broke will help them about breaking those rules again, assuming they wish to not break rules, which it appears is generally the case.
I've had posts removed on subs for breaking some arcane rule before. On some subs it wasn't clear why, so I just never posted again. Others told me why, and even gave directions on how to avoid it again (usually flair related rules). It was easy to successfully post going forward on those subs.
Too many subs have completely ridiculous rules and tyrants for mods. Some subreddit about interesting pictures didn't want screencaps so they made the rule say "screens" and then removed posts involving any screen anywhere even if the contents weren't the focus, like a cool breakage pattern. Such a sad state of existence salivating at such a tiny amount of power that you ruin a subreddit for everyone removing valid posts. I honestly wish subreddits had no mods at all, only spam removal allowed, after having had to deal with the bad mods that ruin the site.
Most people don't want their posts removed. Informing them of what rules they broke will help them about breaking those rules again, assuming they wish to not break rules, which it appears is generally the case.
I've had posts removed on subs for breaking some arcane rule before. On some subs it wasn't clear why, so I just never posted again. Others told me why, and even gave directions on how to avoid it again (usually flair related rules). It was easy to successfully post going forward on those subs.