They are definitely not. Anecdotes aside, psychedelics are extremely overhyped right now and the downsides are heavily downplayed online. The studies about psychedelics and depression use heavy amounts of therapy and careful professional guidance, which the at-home experimenters don’t get.
Psychedelics can also produce intense negative reactions, such as persistent false beliefs or even a worsening of anxiety and depression that lasts for some time. Many people online rush to dismiss these negative anecdotes if their personal experience was different, but they’re much more common than enthusiastic internet commenters would suggest.