It sounds to me like this practitioner is trying to, in mechanical terms, heal mental consequences with psychomancy in the manner that biomancy may heal physical consequences. She could use Reiki, replace physical with mental, and call it a day.
The problem is that human science understands biology and physical trauma far, far, far more thoroughly than it understands psychology and mental trauma. When someone has a fractured bone, a trained biologist will know
exactly what needs to happen in order for that wound to be healed... and thus a trained biomancer could help speed the body along on its natural healing process. With mental trauma, however, it is nigh impossible to have that level of certainty. A psychomancer attempting to help a mind's natural recovery would have to tread very lightly to avoid accidentally
something up and making things worse. The human mind is used to being Alone in the dark space behind its eyes and it may not react well to having that solitude disrupted, regardless of what that person may have
said.
Regarding Lawbreaker, I don't have PG with me to confirm this either way, but are we
certain that
Molly entered their minds without their consent
? Part of me wants to say that
informed consent will allow a PC to avoid acquiring Lawbreaker, since magic respects that sort of thing in regards to other thresholds, but it wouldn't necessarily let them avoid being tried as a warlock by the White Council
anyway.