I think it's a fair thing to say....that pushing relationship boundaries is typically a borderline issue, just like mood swings are bipolar-like.

No one's saying, "Hey, all you borderline people, yeah YOU! I'm picking on you."

It's more of a "yeah that's typical of borderline diagnoses", hence why DBT was creating to try and help curb this.

Facts are facts. Doesn't mean it applies to EVERYONE, but in general that is a borderline thing. It doesn't mean non-borderline people don't do the same thing.....they do, but it is a TYPICAL and NOTED part of a borderline diagnosis.