Is BPD Real? Some say it’s not … ??

Is BPD Real? Some say it’s not … ??
ajmahari.ca/sessions
What do you think? Why do more and more people talk about BPD saying it’s not real? BPD is getting way too conflated with so many other and/or co-morbid diagnoses that may or may not be accurate.
How real is borderline personality when it’s conflated with endless other things?