On my part, for example - USSR wasn’t holy, but its demise instead of improvement is a giant tradegy that still negatively echoes in the world history.

I agree, but that’s not the position I described.

Someone else would say there’s nothing wrong with prostitution, for example.

Definitely better than alcoholism.

Some would point out folk medicine is not all entirely wrong even by medical science standards and it becomes a problem when patients ignore science in favor of unproven methods.

The latter is what I meant exactly.

And at the end of it, you end up with the comment that is half wrong, and the message poorly sent.

That depends on reader’s interpretation, so you are basically ascribing your own choices to me. If something isn’t clear, it doesn’t mean you can pick the wrong variant and ascribe it to author of that comment. It just means you can ask.