I understand your sentiment completely, and likely would go about this very similarly to yourself. One thing to bear in mind is just how important programs like this can be for reframing the general perception of psychedelics for a lot of people. It being a sanctioned, "medically approved" experience can be a huge point for changing minds on this sort of thing.
This costume looks like it could've come straight out of Elden Ring. Only suggestion I'd give seeing the unedited photo is that i feel like the patina on the headpiece has a much starker contrast between the corroded green and the more copper-ish/bronz-y areas. I think if the bronze looked more dull and faded as well would probably blend a bit better.
Please don't take that the wrong way, overall it's still a kick ass costume, just some small thoughts i had that might help if you make anything else in this style down the road :)