"Should this company be allowed to make massive profits off of their investment in clinical trials?"
Any reasonable person would say "Sure they are allowed to make a profit off of that." I don't think there's going to be much objection to that question.
But that's not the real issue, and I think if the author is honest he knows that. The real issue is:
"Should MS patients, many of whom are poor, be forced to pay $50k/year for medication to help with their condition."
The answer to that is obviously no. Now you can say that the insurance company will take care of it, but that's presuming people have insurance and that the insurance company isn't going to dump them, they're not going to have a deductible they can't afford, etc.
When it comes to medicine, ethics have a larger role to play than say, home decor.
Anyone who doesn't acknowledge that is being disingenuous.