Yeah. Seems likely that the subjective experience of the trip is simply what you feel when firing/rewiring the networks that cause the healing. There's no incompatibly between "it's the experience" and "it's the neurology" because they are one in the same.

But there are a lot of different ways to do the healing (e.g. consistent meditation as others mentioned) which will of course be coupled to different feelings/experiences. The "large psychedelic dose" method is just one end of the "works fast + feels strongly" spectrum. Of course as the science/technology develops we will find other points on the spectrum that balance the properties differently -- maybe even through placebo effect alone as suggested here.