I don't think anyone disputes that they work for some people, but only around 50% will receive any benefit whatsoever, that's being generous, compared to 25% for a placebo, a huge number of people are taking these for no reason except to reduce their doctor's liability should they harm themselves. And being technically "medicated" they are much less likely to shop around for something that works better for them or might supplement the ssri, which is almost always the correct treatment strategy.