Exactly. There are reasons for those many deleted comments. It's specific to this subreddit for very good reasons and not something you can use to disparage all of reddit. Many subreddits have their own rules and culture.

It's not disparaging to point out a fact. The whole delete comment content but keep the comment and then add a reply comment with wordy reason for deletion of comment content is a shambles. And irrespective of whether it's on every subreddit or not, doesn't make it less so. It's basically just spam at this point.

My solution would be to simply delete the comment and PM the OP. If another user had already replied, replace the original content with a *short* reason for deletion, and PM the OP, leaving the replies in place unless they needed deleting.