I also find that my personal experience gets watered down by calling myself neurodivergent; it feels like a modern version of being called special. I have several conditions
Aah so you're upset that you're not called "extra special", got it.
A person with cancer has an illness. Someone with autism is neurodivergent. Just how words work. Some are specific and others are broader. Water is a liquid. But not all liquids are water. Spaghetti is pasta, but not all pasta is spaghetti. Autism is part of neurodivergence, but not all neurodivergence is autism.
Also neurodevelopmental issues are part of neurology. Listing those two side by side is like saying "today I drank liquids, then I drank water, then I had pasta and some spaghetti."