The lesson that holier-than-thou do-gooders never learn (or deliberately continue to ignore): monetary donations are fungible.
There is no business to fund people in oppressive regimes!
The oppressive regimes will take the money, feed the population to the level they can be useful slave and use the rest of the money on oppression and military.
It is kind of like feeding starving people in concentration camps - it will enable them to work longer, but it will just make their life more miserable and the rulers will be the only one to benefit!