Yes, but if you look at it medically the book is still bullshit. The body adapts to early trauma. It doesn't adapt back. That's just not what it's designed to do.

Even DNA methylation follows that principle: easy to put the tags in. Very hard to take them back out (mostly happens during cell division which happens less and less when you age)

Of course if you took this message to patients as a therapist, good luck holding a job.

Yes? Always has? That's literally why you heard that saying somewhere.