Are you really asking why advertising that “the following comment may be hallucinated” nets you more downvotes than just omitting that fact?

You’re literally telling people “hey, this is a low effort comment” and acting flabbergasted that it gets you downvotes.

It’s not irrelevant, it’s that you don’t actually know if it’s true or not, so it’s not a valuable contribution.

If you started your comment by saying “This is something I completely made up and may or may not be correct” and then posted the same thing, you should expect the same result.