If your giving is a cynical PR effort, you don't donate to unsexy causes like better toilets or nuclear plants. I'm willing to believe that MacKenzie Scott's giving is a cynical PR effort because she's donating to all the trendy social justice causes. That's what I would do if all I cared about was my public image and didn't care whether my money actually did good. Most coverage I've see of MacKenzie Scott's giving has been positive.