It's abouut as rigorously defined as most things in psychology and about as easy to replicate in a lab as most things in psychology. It labels repression of emotions as a bad thing, but you can find a half dozen studies showing people who ignore traumatic events have a faster and healthier recovery than those that don't - and then turn around and find a half dozen studies showing the opposite.
Its main value is as a political tool to try to change people's behavior you disagree with, simply because you don't like it. When it stops being useful, it will be dropped for the next fad.
Its main value is as a political tool to try to change people's behavior you disagree with, simply because you don't like it. When it stops being useful, it will be dropped for the next fad.