Although you have to contribute something that someone else will pay for such as not parenting.

I'm sorry, that's not allowed by the premise of the OP's post. The OP's post is making an attempt to say that only human's have to pay to exist.

Under that narrative, you're welcome to embrace the parenting style of non-human species. I believe that mostly means scattering your reproductive DNA in various ways in a numbers game hoping a small number of your offspring actually make it to adulthood to reproduce on their own while the rest of your offspring die of exposure the elements, predation by other species higher on the food chain, or easily preventable diseases.

OP's post encourages you to embrace the superior lifestyle of non-human species!