Does any single person taking an illegal drug say to themselves.. ' this is not legal'.. I won't do it ? No they don't . The only thing it does is to create an illegal market to exploit.
I think there are probably a lot of people who don't ever take them because they are illegal. There will always be some people who won't take them, legal or not, just as there are those who don't drink alcohol. And we know prohibition doesn't remove the market, either. But I suspect it does limit it. My mother got off heroin in the '60s, and while she had many years without alcohol, she always ended up back on it in the end, and I suspect a lot if that was in part because she could get a bottle in Tesco when she went to pick up a leaf of bread, and eventually, it killed her, even though she was dry at that point. Alcohol being legal doesn't stop its problematic effects, and nor would legalisation of other drugs ,but I think less easy access does limit the numbers.
Whether it being legal would remove all the other ethical issues around its supply, I don't know. We can grow opium here (there are a limited number.ber of licensed growers in the UK for medical opium,) but I don't know about coca, and I am sure existing growers would still find ways to undercut the market, because I can't imagine them turning round and saying, yeah, no, that's fine, it's all legal now, so we're just going to comply with all the employment and tax legislation and so and go legit. In any case, I can't see any government going for it, as they'd lose reelection because of it, because it's such an emotive subject.
Anyway, none of that is really going to help the OP, but I think she's already knows what is her best course here.