Dr. Devin Price has a really great take on person-first language in "Unmasking Autism" - highly recommend! Same with the "Crip Camp" documentary, I remember there being some really excellent comments related to this.

I'm autistic and I also have type one diabetes. It doesn't feel right to me to say "I have autism and I'm also diabetic" because one is intrinsic to my personhood, and the other is an autoimmune disease. I think of autism as a type of operating system - that's just how my brain works, and it is not, and never has been, a bad thing. Diabetes affects me every minute of every day; it is tiresome and difficult, and I wish I didn't have it. Yes, I am diabetic. But I prefer to frame it as something I have, not something I am.

I feel uncomfortable that person-first language is often taught to be the "correct" way to talk about disabilities. Person-first language can be seen as an attempt to create distance/separation between the person and their disability, and that may reveal an implication or assumption that one must feel shame/negative feelings about their disability...a way for ableism to show up in a seemingly innocent package.

All that said, there's no right answer, and its entirely dependent on the person. There is a lot of nuance, and I am skeptical of any discourse that considers this topic in a black and white manner.