I don't know. Everyone has kids. Having kids is technically making an impact, but I think that when most people say they want to make an impact, or to accomplish something great, or to change the world, they don't mean by doing something that almost everyone else does.
I guess that's what the "help getting over it" part was referring to. In your teens/early twenties you dream of changing the world, and after reality sank in, you do the next best thing and go for kids because you shape them and so live on through them, mission accomplished, impact has been made. Humans are great at bullshitting themselves. (Not trying to sound harsh or implying kids are worthless or anything, but it really seems to be a fallback plan for a lot of people)
No, it's hoping that you plus your kid(s) will have more impact than you alone. Or that your kid will magnify your impact just by existing (which there is some evidence for if your chosen venue of impact is electoral politics, at least.)
Isn't this what humans like to strive for? Making an impact, being remembered after death, thus living forever. That's one of the things a family (with kids) helps you get over, you know, the whole "living on through your kids" thing. If they don't end up as homeless drug addicts, it probably kinda works.
I've taken a job at a university two years ago. Pay is much lower than before. Haven't felt anywhere close to overworked or burnt out ever since, even though I've stayed until late at night occasionally when we fucked something up by deploying without any proper testing again, because hey, it's such a tiny change. I'm not doing frontier science or anything, we're just working on a custom netbooted Linux distro that also runs windows vms via qemu-kvm, for teaching environments. A lot of what we do could be dismissed as NiH-syndrome or creating solutions to problems that have already been solved by big companies, but as long as someone is paying for it I'm good with this job. Because there pop up a lot of problems or requirements that are just interesting to solve by yourself, actually not just for fun but for actual use cases. Nothing game changing for humanity, not for millions of people, but for some. And I will interact with them directly, and sometimes they tell you that they like the system you helped develop. That, and the fact that you're not in competition with your coworkers or another team or anything really makes for a great work atmosphere that I'm currently really enjoying. I don't know how long I can/want to stay, but for now I can say it greatly improved my overall happiness.