Bullshit. The reason that psychedelics are under-researched is that the corrupt medico-governmental chimera has a vested interest in blocking the substances and preventing the research that should have taken place decades ago.

I know, from repeated personal experience, that psychedelics (or mushrooms at least) can be highly effective against even severe depression.

They have been the single most effective anti-depressant that I have ever taken.

Now, I haven't had the depression curing wonder of an experience that some people claim;

It never pulled me out right out of it - but it pulled me back from suicide (on multiple occasions) and a single (rather large) dose is effective for 3 or 4 months before I find myself spiraling back down.

And if we're gonna have a conversation about anti-depressants that are being used despite scant evidence in their favour, perhaps we should start with SSRIs - which not only made my depression worse, but also left me almost asexual for ~20 years.