Progressives routinely vote in ways that conservatives would consider against our interests. Fot example, I don’t have kids and never will, but I always vote for policies that will improve schools, pay teachers more, etc, even though technically I’m spending money on something that doesn’t benefit me directly. It’s just that progressives see that we all benefit from having a healthy, happy, well-educated population, while conservatives only care if they (or maybe a handful of family/friends) benefit and don’t care about anyone outside of that circle, particularly.