There's actually a good deal of scientific evidence that MDMA and LSD are highly useful for treating anxiety disorders and things like PTSD when used in conjunction with cognitive therapy, all from accredited and accomplished scholars. Unfortunately, the government does it's best to squash basic research into this essentially because they don't want to have to deal with ANOTHER semi-legalized drug in edition to marijuana.
It's kind of crazy what you have to do in order to research it to0. Armed DEA agents on site, massive safes to guard the miniscule amount of MDMA provided for the experiment, constant drug testing... it's all much more strignant than even marijuana testing.