The bigger issue is why that healthcare is inaccessible to them in the first place? How do you or I go about solving this? How are you and I gonna bring this attention to Congress, and get their asses to work on that issue? Unless we both quit our careers to go into politics, it's not really possible for a random no-name person to make that change for the greater population. How about the other 10k people who can't see or hear? What about them?
If I had Mr Beast's financial or influence level, the next step I would be doing is wondering why those 1k or 2k people didn't get their healthcare and then trying to patch that. We all know how much of a scam our current system is. Once that's patched, everyone gets to eat for life, not just a single batch of 1k people in my lifetime.
Individual contributions are great and welcomed, but temporary. Societal change is where things get real. Cmon bro. It's why we have 40 hour work weeks, why women can vote and get college education, why lgbt community is accepted. And it's not like individual contributions and making society change are mutually exclusive... So what' stopping Mr Beast from going to that next step?