This. Exactly this.
First of all, I want to say that I have been diagnosed with ASD level 1. I am one of these high functioning autistics. I am a nuerodivergent person who for years was labeled as some sort of manic pixie dream girl. I am also a teacher who has weeks with various students diagnosed with autism. While I agree with many things in the nuerodivergent movement, mostly that the world needs to be more accepting of nuerodivergent people, I think many people with level autism such as myself, have a great deal of privilege in terms of in the spectrum, and I’ve heard many of them say ignorant things about ASD, and assume they speak for everyone on the spectrum which they do not. One person with autism, is one person with autism, it differs widely from autistic to another, more so than an autistic to and a nuerotypical.
Yes, for me, many parts of autism are just quirky personality traits, but some are not. There are parts of my autism that are purely not fun for me, that I don’t identify with, at all.
I don’t enjoy my sensory issues. I don’t enjoy all of my stims. Some of my stims are actually physically harmful to my body and have caused percent damage, and I can’t stop them.
Many autistics talk about masking, which is intense and exhausting. They don’t realize being able to mask its self is privilege. Many people can’t hide their autism and are discriminated against.
Controlling one’s stims is also privilege. Being able to speak and moves one’s body is privilege they often take for granite.

As a teacher, I’ve seen autistics who stims so much, they can’t drive a car or cart objects (they drop them while stinking). I’ve seen autistics who fly into such meltdowns, they almost murdered family members, despite not wanting to. I’ve seen autistics who badly want to communicate with their parents and can’t and are super frustrated. I’ve seen students who will never be able to support themselves. I’ve also see autistics like myself who can function and hold a job and are just seen as a bit quirky. I do agree with parts of the nuerodivergent movement, and while autism is autism, I think people in my state need to recognize we haven privilege and don’t know what it’s like for other people on the spectrum. I’ve seen a lot of ignorant statements from the nuerodivergent movement from autistics like myself.
I will agree that autism plays a big part in who I am, but I personally feel I am separate from this condition, I am more than it. But I’ve literally heard autism described as just some personality quirks and I totally disagree. Is it a personality quirk that my skin is hyper sensitive and I might scream if someone touches me the wrong way? Is it a personality quirk that it was hard for me to communicate when I wanted to so bad?

Maybe for some people their autism is just a personality quirk, but for many this condition has debilitating symptoms that aren’t who we are, and it’s okay to say that. It doesn’t mean we hate autistics or anyone.