I choose to look of it less as taxonomy like horse vs. zebra, and more like data/story tagging, where you can keep adding more tags to get more specific. Sure, not everyone with the same tag will be IDENTICAL, but a lot of your experiences will rhyme with one another, and the more tags you share, the more rhymes you'll find.
I share a lot of Autistic folks. I share a lot with ADHD folks. But I share even MORE with AuDHD folks. Then I share even more than that with trans AuDHD folks. And even more than that with ... etc. etc.
Sometimes it ends up that yeah, I'm an outlier within one specific tag, but when I find people with more tags in common, it's weird how many things in our brains rhyme...