We already know that you don't really have to pass a test to become a parent. We also know that parenting is tough. It's rewarding, of course, but it is tough. Things don't always go as plan. Life has it's little hiccups and you learn from them.
When you have kids or even, in my case, grandkids you know they need a lot of stuff. When my daughter was preparing for the birth of her first child she realized how much stuff this tiny baby was going to need.