My definition goes back to Stu's social/medical one above. With the corollary that society depends on time and geography.
I am of the opinion that people are asked what they want as it relates to themself. So, you are asked if you want death/cure because of your 50% deafness. You are making very broad generalised statments about other physical or mental restrictions though, based on your imagination and current understanding.
I am asking what you consider to be a "disability or condition". With the example of autism.
_________
Both of these statements are rather perfectionist. Is there a cut off date for age? Or a start date by which a child must have achieved this untrammelled perfection?