A page per treatment is not optional, because the price, the procedure and the audience have nothing in common between one and the next. A single "our treatments" page answers neither the cost question nor the fear question.
The doubt searches matter more than they look. "Will it hurt", "how long before it wears off", "what can go wrong": answering those at length gets you found by people still weighing it up, and they book later with whoever took the question seriously.
The advertising rules don't reduce visibility, they change the register. Sober, complete information ranks better than promotional language anyway, because it deals with exactly the questions people type.
Reviews and practitioner background carry unusual weight here. Someone nervous reads the reviews and then looks for who is actually performing the treatment — and most clinic sites never say.