[randomdata]

Human living conditions are well suited to supporting children (human living conditions are designed for humans after all) – other animals like dogs, not so much.

Financial viability is improved with children (they start to contribute once you get past the first few years) – other animals like dogs, not so much.

Existing time and attention focuses can much more easily integrate children (like dining out? Bring your children!) – other animals like dogs, not so much.