People’s issue isn’t with Musk trying to help, it’s Musk trying to help as a thinly-veiled publicity stunt. If Elon Musk has reached out quietly to the Thai government and asked what he could do with his resources and connections to help, THAT would have been using his resources for good. Throwing a bunch of your money at a cool-sounding but absolutely useless project that nobody asked for while making a lot of noise on Twitter about how helpful you are is pure self-aggrandizement, and that’s what people are reacting to.