Absolutely not, it’s actually the most unselfish thing imo. We’re on an overcrowded planet with limited resources, orphanages across the world are full, and bad parents abound.
People may look at you askance when you don’t need the validation of a mini-me, because so many people do, but life is full of opportunities to foster change, to volunteer to help others, to learn, to travel, to create- we aren’t offered only ONE path in life. And yes, I have two dogs that needed homes, and four birds, and ⅓ of a city full of children that I try to help.
My dna isn’t that spectacular and I’m not afraid our species will die out, just be you and do what makes you happy. Just remember, it’s not always easy on your parents, or yourself to make the choice not to have kids, people may say you’re abnormal, or there must be something wrong with you, but as long as you know your reasons, it’s really no one else’s business so you aren’t required to answer.