The handles on the wardrobes are also low. I think it's possible there's a short person about.
I'm close to retirement age - in fact, I'm double dipping, retired from Place A when they froze my pension at earned benefits and took a job at Place B. And I still refuse to grow up - I play video games and the like. But my body is definitely aging.
Encouraging parenting is different than mandating it. Ergo, the idea that it's not for everyone is included. Furthermore, I'm afraid some of the most abusive parents are quite likely to think they are the perfect people to parent, and will go ahead whether they are encouraged or not. The point is that parenting does change ones viewpoint in a way that might be viewed as beneficial for society as a whole.
My oldest is over 40. I still parent him. Even though he's in another country. Erma Bombeck wrote a piece about this once - about asking her mom when it gets easier, and eventually realizing (without being told directly) that it never does. The older they get, the more they are out of your control - and that's good - and the bigger mistakes they can make. And you still love them just as much, but now you have to watch them and not interfere.
The worry never ends. The wanting to make it better when they are hurt never ends. The ability to actually do something diminishes asymptotically toward zero.