So what's up with that? I went to a lot of work writing those posts.

Is this the sort of thing done with approval of the site owner?

They were well thot out and reasoned posts. The majority were very civil and violated no posted rules. In fact there aren't any posted rules that I am aware of. Just because my posts are annoying to some folks is not reason to delete them. NO one has to read anything.

I just don't understand the reasoning there, or here:

"A specific suggestion I have is to establish a community norm of downvoting those participating in hopeless conversations, even if their contributions are high-quality."