What's the point of all of it? (Life, breeders, and the purpose of living)

Title sounds ragebaity, i know, but i have no other way to explain it. I really want the opinions of older, childfree people (whether men, or women)

My (21F) Sister (36) is currently pregnant, and everyone in the family is raving about it. Yesterday when it was announced, I asked my sister, Why? Why did you get pregnant? My mother (53) butted in, saying that my sister wants to be a mother. And so i ask again, Why? Why want to be a mother? My mother then replied, because that's our purpose, it is what we are meant to do in life. And even today, after my exam, i called my mother to tell her i was done with it, she didn't even let me say hello, good morning, and immediately opened with; Are you over your shock? Are you ready to be happy for your niece? That moment, i really wanted to say to her, No i am not and i never will be.

And here comes my spiral....

If having children is all there is to it, what is the point of all of this? Why travel, study, rescue animals, and do anything meaningful with your life, if all you need to do is keep this species going?

The point is, I'm childfree. Never wanted kids, they disgust me, and even imagining myself as pregnant brings me disgust. I gag at the thought of it all. I would absolutely hate raising them as well.

I fear that my family views me as lesser, or even disturbed for being this aversed to children. But i dont want them, yet they think that is our only purpose as people. But it isn't, because if it was we wouldn't be doing things that are personal. We would procreate, and nothing else.

My question is, what else is there to it? I know that life is NOT just about having children, but what other purposes are there? What is the meaning of our lives?

Because even if they do have kids, what then? The kids will have kids, and so on and so forth. The cycle will continue, with nothing else to it. No meaning to it. Are breeders satisfied with this idea? That all the meaning in their lives is to have kids? Are they really happy knowing, and even AGREEING, that their purpose is to procreate endlessly, or at least until civilization ends? Doesn't the thought make them sick to think about? Or do they just not think about it, and mindlessly do what evolution has told them?

Sorry if this post is unrelated to the sub, or talked about a lot. I am having a spiral because people around me are saying having kids is my purpose, so if i dont want kids, then what is my purpose?