I mean, yes, but also any therapeutic modality that works with these populations is tapping into some consistent realities about human nature that can be applied generally. The reality CBT is tapping into is that gaslighting someone into toxic positivity (or gaslighting someone at all) will show effects for a few weeks, but it's not long term.

Our society doesn't value teaching children soft skills like healthy communication, or understanding what emotions are and distress tolerance around them. These are very basic things that a lot of people only learn after they get into therapy. And they help everyone if applied correctly. The skills you learn in DBT are skills that can help EVERYONE. When you learn how to communicate better at a gold standard you help yourself and the people around you.

If we have a gold standard that can be applied to the most severe cases and help, and this isn't based on anything specific to those disorders but rather taps into some very core "how to be human and deal with weird lizard brain hurty emotions" stuff we need to start using that. Using our brains to rationalize our way out of emotions got us to where we are as a society now and it's pretty unhealthy.