It’s easier to defend than you think. It’s enough to show that there was no proof of that they didn’t work at the time of introduction, and there was indication that it maybe worked. I definitely don’t have the knowledge to prove or disprove it. If there is no evidence now about its efficacy, it should be removed. Unfortunately, I’ve seen 0 discussions which mentioned any hard evidence. Even in this case, it was removed because of feelings according to the link.
