Psychedelics arent foolish, not everybody can or wants to arrange their lives around yet another (albeit important) item in semi-endless list of items of our lives, tripple that when having various responsibilities adults tend to have.

I've done similar techniques, maybe not long enough, the only thing they achieved is lowering my heart rate so dramatically I become cold. I do a lot of sports so my heart rate is already low in calm environment. I can clean my head fully in 1s and keep it that way, so this aspect of meditations is not interesting to me.

Overall, there are use cases and room for psychedelics, as there is also for various meditations and breathing. No reason they can't coexist, there is no good / bad side.