There are two parts to the characterization at play here:
1. Psychedelics are not "abused" in the same way that other substances are. Furthermore, when psychedelics do get abused, the adverse effects are expressed differently, and patients are not routed through the same treatment channels that addictive substances see. Since psychedelics aren't addictive, users usually don't need ongoing maintenance to prevent relapses. Instead, victims of psychedelic side effects usually suffer from catastrophic burnouts after the mother of all bad trips, or persistent neurological symptoms creep in after a period of experimentation, and remain possibly for life. Once that happens people quit cold turkey, and cope with their flashbacks however they must.
2. Being a director of anything isn't a huge deal. It's not much of an auspicious title. Like manager or vice president, after you meet a thousand of them, big deal. Meanwhile, as for doctors, you'd be shocked at how sheltered some doctors are. Many of the doctors I've met only became doctors because their parents forced them into it, and they spent their youth locked in their bedrooms getting good grades, and those geeky scholarly habits stick with them into middle age. It wouldn't surprise me to meet a doctor who is a total outsider to the patient population their supposedly expected to treat through book learnin'...