Isn't this what the "Right to try" laws are designed for? https://en.wikipedia.org/wiki/Right-to-try_law

Although it does seem like many companies are still not allowing this. I don't know much on the topic and I'm not sure why (financial reasons perhaps?) they'd refuse, but I've always found it absurd that we can poison ourselves to death (literally) with all sorts of substances legally, but experimentation with life saving methods are restricted. I've seen some very strange arguments against the experimentation like "well they could die sooner!" - yeah, but that's up to the person to decide, just like all other decisions they've made preceding it. A patient has the right not to choose any treatment at all, that could definitely make the die sooner. Why is this where the line is drawn for some people? It seems arbitrary.