The benefit to society from donating to charity can range from positive, to zero, to negative. Often negative. Anyone with money can donate, but it takes a lot of work to donate to things that make the world better. The Pineapple fund seems to have put in the effort to donate to projects with high positive impact, in a way that does the most good. (It's possible to donate to good projects in bad ways, such as by requiring them to use the money to build a building with your name on it.)
Doing the work can be exasperating, because you think "I'm giving away money, and I have to do all this work too???" But it's the work that makes the difference.