They do. But the only way to get legislators to budge is by appealing to their owners directly. Psychedelics will never be legalized unless it benefits big pharma.
Separately, ADAPT-WA filed a ballot initiative and will be gathering signatures to get it onto the ballot. [2]
If someone was inclined to do mycology research there is a plethora of information here: https://www.shroomery.org/
[1] https://www.marijuanamoment.net/washington-state-legislature...
https://www.oregon.gov/oha/PH/PREVENTIONWELLNESS/Pages/Orego...
Saying that psychedelics may help some depressed patients will instantly prompt the defense "but we already have tons of antidepressants to give them, with a diverse range of mechanisms of action; psychedelics cause schizophrenia bla bla".
By pushing the focus towards cancer, which is a more sensitive topic, people is more prone to make some concessions. That applies to legislators too.