You're creating a scenario where there are two options. In my experience that is almost never the case. Sometimes you have many options, sometimes you have none.
You're making assumptions about how family comes to be, who you would define as family, and making assumptions on what a person's obligations to family should be.
In all these cases, you're positing a sort of hegemonic perfect person who has total free agency and no history to contend with.
If that's truly you, that's fantastic. Cherish and enjoy that liberation. But just remember that to have that agency, millions of people have struggled without such things.
I think it's great that you've made a decision about whether or not to have kids in a purposeful manner. Many people don't, and I wish they would. I have a kid and I wouldn't trade him for any fancy startup or company founding in the world. Different strokes.
But it also leads me to believe (and correct me if i'm wrong) you've never had to, or thought to, work and live to serve and enable the lives of another.
I think that's totally ok. I'm not judging you there. But I am asking you to consider that others find value in that path, and in our current society, that path is often derided and consider "unsuccessful."