Tramadol also has a bunch of shit in it, I feel like it's a 'dirty' drug. For example, it's very closely related to the chemical structures of antidepressants. This can be helpful, but not when you need to stop it. You also can't really take any serotonergic medicine either as you'd be at a very high risk of serotonin syndrome. Nobody wants that.
Honestly, old and true medicines really do work. I'm not saying the Sacklers are awesome, they're fuckin'evil and didn't value human lives - but the drug works for those who need it.
And Cannabis is not legal in New Zealand, at least yet. We'll find out on the 30th if it's going to be...
(I have to be on it after burning my entire left arm, and chest with burning hot oil - I also educate myself on medicines as I used to work in said sector, and I do have seizures and Tramadol is well known to lower the seizure threshold very very fast)