True. In some Asian cultures, they consider us Westerners barbaric because we make our kids sleep in their own rooms. They typically have the kids in bed with the parents and see nothing odd about it.
Which actually is quite common in western society as well, even though many parents are a little ashamed of it ("yeah, well, our five-year-old STILL sleeps with us sometimes", they say, blushing). Some choose it actively (google attachment parenting if you're interested), but in most cases the kids simply decide they want to sleep close to the parents and won't take no for an answer. Sure, some parents are into cry-it-out methods and such, but many just choose the easy way out, in order to get some sleep at all.

I'm more annoyed about the lack of doors at inns. Especially since NPCs can decide to sit and have a drink in the room you just rented just as you were about to go to sleep.