I would answer both of those questions with "sometimes" or "maybe".

Psychedelic experience is often a trigger that allows the one going through it to quickly bypass some (but not all!) obstacles on their Path.

e.g. a single MDMA experience might allow the person going through it to be more forgiving (albeit temporarily!) than they would otherwise have been able to, seeing the value of such a perspective and increasing the likelihood that they will engage in the on-going work that you describe.

As with most experiences, its impact (and duration of) exist on a spectrum.