This stuck out to me. I'm not sure if you're serious, but I'll bite.
Kids need more than pets. They're people, not a puppy. You can't just leave them to figure it out on their own, nor can you lock them in a box with a tablet and some Cheerios, although I'm sure most parents have wished they could from time to time.
They're still pretty useless after 1 as well. Barely walking, still not talking, can't read or write, definitely can't call up and order a pizza.
What will they eat? Good home cooked meals, or out of a box? There's no kiddie-kibble...
Who will clean up the mess and spills from that meal? Cleaning with kids around is like brushing your teeth while you eat an Oreo. There's about a 6 foot blast radius to every snack. Do you just let the place get filthy?
Who will help wipe their butt for that first five years? Lots of kids don't potty train until 3-4. Some are still having accidents after that. Now they need a shower too. And how's your laundry pile looking?
What if your kid has health problems? An appointment a week, maybe more? The appointment is 30 minutes away. An hour for the appointment. How's that day looking?
I could ramble on, but having little people around is absolutely time consuming.