

Such a silly argument. Contributing genetics isn’t the only way to influence future generations. I may not be a parent, but I (and many more people) educate others’ children every day.
Just because someone doesn’t bring a kid into the world doesn’t mean they’re giving up on the future. Individualist cultures may have people thinking that nuclear families are the end-all, be-all of child-rearing, but it still “takes a village.”

If your highest goal is self-preservation, then yeah, it doesn’t make sense. However, protestors like this usually care about something more important than themselves. It’s what drives them to put themselves out there, knowing they could be at risk for doing so.
I’m sure we could disagree on what specific things would make sense to potentially sacrifice one’s self for, but I hope the simple idea of something being that important at all is relatable. For some it’s their rights, for some it’s their religion, and for some it’s their family, but either way, most people can think of something they consider more important than themselves. It’s that importance that compels people to defend it, despite the personal danger for doing so.