That's your assumption, and I believe it's pretty wrong. Advocating for changes that go against your own immediate self-interest isn't lack of self-reflection; if anything, it's often a signal of a correctly pointing moral compass.
No man is an island. Rare is the person whose friends and family work in the same booming industry as they do. Even if you benefit from exploiting other people, you might want to that exploitation to cease for the sake of your own life, or the society you live in.
