if a person is going to study something that will let him earn a lot of money, I’m not particularly inclined to subsidize his success with taxes
Subsidizing his success with taxes is a good investment. Once he becomes successful, he’ll pay more in taxes than it cost to subsidize him.
A person who has (e.g.) a developmental disability is apparently not very important to you
This person’s college education is probably not a good investment. I’m not making any other claims about him, including about his moral (as opposed to financial) worth as a human being.
I will not let you declare me a burden for my handicaps including me not being able to go to college
If you aren’t able to go to college, I’m not sure how your personal experience is relevant here.