The future has always been an unknown, who knew Covid was coming? GM you had children who you love, and who in turn love and care about you. If none of us had children, who would look after the sick, who would develop systems to let us shop from home, build houses, etc., etc.
I'm an only child, so I knew I'd never have just one child by choice. We too have a daughter and a son, they are adults we are proud of. Our grandchildren are growing up with good manners and consideration for others.
However, I think its selfish to have children and not care about them, or not try to support them financially, or treat them badly. Another thread touches on children in care, many of those children are the result of selfishness.