Why you could have kids
They can bring so much more love to your days.
Helping them to become good persons can be your most rewarding project.
They make all workdays meaningful. After all, you have to take care of their well being.
They ground you in society, making you care about how it is handled.
They will force you to be better, as you are an example to them.
They are a mix of you and your loved one, a testament of your relationship that will outlast both of you.
They give you lots of good things to expect as you age.
In other words, they can bring a lot of meaning to your life. That said, I think that it is definitely not for everyone. Having kids can be rewarding, but you will have to invest a lot of yourself.