Soft power seems like mostly wishful thinking at best and a fraud on the taxpayer at worst. I don't think the noble savages feel forever indebted to their kind and wise master for throwing them a few scraps. Countries align with what interests them. Look how quickly countries all over Africa, South America, Middle East, the subcontinent turn to China and Russia. All the vaccines and condoms in the world aren't going to stop people and countries wanting to get the best price for the things they buy and sell.

USAID also has a fairly sketchy record in funding regime change efforts, so countries cooperate with it on a purely transactional basis, "trust" is zero.