This argument ignores the fact that medical research into the potential benefits of "this nonsense" has been under way in the US for over 20 years. Johns Hopkins has a dedicated research group in this area [1], and has published peer-reviewed research for various applications of these drugs.
It's easy to become cynical about psychedelics, because there's a ton of bullshit in the space. (And it's probably fair to assess that the push of these substances into the black market helped create an environment where only "hippie-esque" bullshit could thrive). But the results seem pretty clear that there's real potential in these drugs to alleviate human suffering in many ways.
Does that mean that these drugs unlock magical insights or enhance the intelligence of their users? Of course not, and no one serious is suggesting that they do. But there's been plenty of real research over the past two decades that makes dismissing the medical value of psychedelics as "nonsense" a fairly silly take.