Neurodivergence is more a sociopolitical movement where scientific facts are but one relevant factor. The problem is working with a relatively reductive view of disability and neurodivergence as two binaries. Either you are or you aren't. The reality is more a layering of multiple spectra of diffrerent qualities/tensions. ADHD involves some of these qualities/tensions differently than autism, but it's a useful category. A first step to understanding this is looking at neurodivergence in context of the social model of disability:

https://www.disabilitywales.org/neurodiversity-and-the-social-model-of-disability/

I also saw this interesting article looking at the risks/limitations of the social model of disability for neurodivergence. It's an opinion, but a nuanced one.

https://www.autisticscholar.com/social-model-neurodiversity/