Narcissism.
"I want someone to love me unconditionally" = I will create a being completely dependent on me so that it is obliged to love me.
"I want to extend my bloodline" = My genetics are so great they deserve to be replicated.
"I want to pass on my values and beliefs/I want a human to mold" = My beliefs and values are so important that I am justified in forcing them on to another person.
"I want someone to look after me when I'm old" = I deserve to have someone obligated to take care of me in my old age.
"I want to make the world a better place" = I think it's important society is improved, but instead of doing it myself I'll make someone else do it.
"I want someone to have the opportunities/dream I didn't" = A child should be exposed to suffering and misery so that they can live out my unfulfilled dream.
I personally don't see reproduction as an act that is hard to avoid. I saw some people here saying "it's evolution, humans have a biological imperative to reproduce, it's like survival instinct" but I disagree. We have a biological urge to have sex, because it's fun. If anything, evolution shaped sex to be fun so there would be reproduction. Humans just have found ways to have the fun but not the downside if we want. Think about it. Why is giving birth such a painful experience? Why are babies screaming and crying as they are born? There is no evidence of biological imperative to reproduce, in an any species. Our concept of the "biological imperative" is based on the human assumption that because some humans want to reproduce (and this want is very strongly tied to social/religious pressures) that all species want to reproduce. Out in nature, the kangaroo can't use condoms. The aardvark can't ask for an abortion. The cow isn't smart enough to know how to take a vow of celibacy. For them, reproduction is an accident. The fact that humans invented things like contraception, abortions or abstinence/celibacy is evidence that's disproves any inherent want/need to reproduce. People reproduce because of narcissism, religion, and social pressure. Because it's so normalized in society, people expect you to reproduce. It's the highest form of narcissism.