That's pretty much how they become brighter. These kinds of hands-on experience are far more transformative and contribute to higher efficiency than if they were to simply donate more money.
I agree volunteering abroad can be a great way to experience first-hand some of the problems in the world, which can lead you to do much more in your life than you would otherwise. I did it as a student and it was important in my life. But that's to say it should be a means to having a real impact later on, rather than an end in itself.
I'm not "picking on" anyone. I'm just reflecting that it would be refreshing if the subjects of this discussion would express some self-awareness. It's hardly surprising that they aren't.
