Shaina there's no reason to be angry, things will be said all the time and some are bound to be hurtful whether intended or not. It's how we react to them that defines who we are.
That said autism is very complicated and judging ones intelligence solely on this is foolish, intelligence is nearly impossible to define as it is. What you call an illness I call a chance to be extraordinary, to stand in defiance to what has been placed upon you.
Now I can agree with you that keeping fish is therapeutic, my ocd flares up now and then and having something constructive to do helps me relax and focus until it passes, not to mention the benefit on my anxiety.
I know nothing on breeding bettas so I won't comment on that but if you do go for it. :)