Feel free to solve a problem and release it for free. People do that every day.

OR just sell me a widget. I don't want a relationship with the software developer or device manufacturer. I just want to buy something and forget about you.

And people give donations to homeless people every day ... but it doesn't mean we have a systemic solution to homelessness.

As said above, if you do want a systemic solution, it needs a business plan. That's just the reality of a world with scarce resources.

Well i mean there is an obvious solution to homelessness: requisition the empty dwellings. That's not exactly a business plan for maintenance in the long term, but that's certainly much better than the current situation.