For some schools that give merit, the aid is tied by the donor’s wishes and may be limited to a certain amount per grant. For an overly simplistic and made-up example, you may have cured cancer but the cured-cancer grant into Johns Hopkins may have a $10K limit because that’s how much income each year on average the fund’s principal generates. They may be delighted to finally find someone who cured cancer, and are delighted to be able to extend those funds and please the donor, but they only have $10K to give.
They could potentially go back to the donor and ask for more money or to rewrite the terms of the grant, but that would probably take time and would potentially disrupt the relationship of the donor to the school, if only temporarily.
And as others have pointed out, it’s rare, really rare to find someone who is that special.