Why do they not want to diagnose me?

My mental health gp said he’s seeing signs of BPD and just sent me. Bunch of links on mind about it. He wouldn’t send me a referral to a psychiatrist despite my very traumatic past, even my counsellor said it’s unusual. In the follow up assessment I asked him to please refer me and he was super hesistant and brought up the “stigma”.

Every grown up adult like middle aged keep saying it’s really stigmatised and I shouldn’t get a diagnosis because it’s stigmatised and psychiatrists are for “really bad” people.

I feel so unseen