"Actually many people with X diagnosis experience empathy" isn't activism when the message should be that we shouldn't mistreat people who don't feel empathy.
"Actually I'm smart even though I'm diagnosed with X" isn't activism when the message should be that we shouldn't mistreat people for not being smart.
"You can have X and still work and study" isn't activism when the message should be that we shouldn't mistreat the people who can't.
"You can have X and seem completely normal" isn't activism when the message should be that we shouldn't mistreat the people who can't "act normal".
And so on.