This is going to surprise you, but parenting is sort of hard. Harder than owning cats, even.
You take care of a tiny little human that relies on you for everything and needs near-constant attention. In return, you’re rewarded with sleepless nights, constant worries, and—later—toddler’s temper tantrums. Awesome!
So then you, a rational, sane person, look upon this shitty deal and go, “Hey, I know! Let’s have another baby!”