Neurodivergence only becomes a disability in context of the society you live.
The medication serves to make your brain chemistry adapt to the fact you live in a world that is increasingly more tailored for the majority of people who are differently wired then us. Its also focused on solving what other people find problematic and less what people themselves need.
Some people perceive an adhd/autism epidemic, my take is that as high pressure society evolves it becomes increasingly harder to fit the norms, people that once did now don’t.
A good example is how i am very sensative to certain artificial light sources that give me a literal headache. If i lived in the past, those light sources would not exist to trouble me. If everyone else would get the same headache wed simply stop producing that type of cheap lights.