Microdosing - definitely not. Regardless of what the proponents say, even small doses of psychedelics induce some degree of impairment (please don't microdose and drive!)

But you touched on one of the key problems with psychedelics: We can't really expect people to trip every few months forever. If psychedelics are used, I would expect them to be in the context of intense therapy. Many of the studies will require patients to go through 10 or more therapy sessions before, during, and after their psychedelic dose.