DNA was discovered on LSD, among countless other major works in math, science, literature, CS, and other fields.
Just Google "things discovered on drugs" or "famous/accomplished people that took drugs", the list is loooong.
Countless artists, writers and musicians were influenced by psychedelics. It's not hard to make an argument that the music most people listen to and love today would not exist without the influence of psychedelics.
The Beatles are just one super famous example, where the influence of psychedelics on their music is super obvious and the tremendous influence of The Beatles is undeniable, but the same could be said of many if not most 60's/70's musicians, which in turn had huge influence on what followed, not to mention the obvious influence of psychedelics on psytrance and dance/club music in general.
Something else to consider is that from the time psychedelics were outlawed until very recently admitting psychedelic use was taboo, and so many psychedelic users were in the closet.
These are more open times, so some people are admitting it now, but many are still in the closet because coming out as a psychedelic user could still negatively impact your job prospects, the way society in general views you, and perhaps your relationships with people you care about.
So there are probably way more psychedelic users out there than most people realize, and their accomplishments when taken as a whole are very significant.
How much of such accomplishments were due to the influence of psychedelics? We don't have enough information to say for certain, but there have been studies on the effects of psychedelics on creativity[1][2][3] which show a positive effect. That's not to mention the well demonstrated potential of psychedelics to help with depression, the alleviation of which could also help users to create and contribute to society.
[1] - https://pubmed.ncbi.nlm.nih.gov/35105186/
[2] - https://pubmed.ncbi.nlm.nih.gov/2723891/
[3] - https://www.amazon.com/LSD-Spirituality-Creative-Process-Gro...
There is also no control, can't exactly tell if that was LSD that made someone discover something or that they just thought that it did. Hell, for all we know drug usage might've delayed the discovery.
Or it might've been as simple as "getting high together brought right people together at right time".
When I was a teenager, I heard the claim and believed it. All these musicians and artists I looked up to did psychedelics! So I took psychedelics! What I came to find, however, was that all of those artists had some sort of classical training early in life and a decade of working hard touring/painting and building their professional practice. The drugs came after, not before.
I'll grant that stimulants may have made positive contributions. Oh how I love/hate stimulants.
The Beatles were highly skilled musicians before taking drugs, but it seems reasonable that attempting to recreate the psychedelic experience on tape pushed them towards new sounds and techniques that they wouldn’t have otherwise tried.