"Space" takes on a whole different, extremely important meaning when they're old enough to grasp the idea of entertainment. The problem with new parents (myself included) is that they want to spend every waking second with their child, participating in their games, playing pretend with them, and monitoring their every action to make sure they're not doing something stupid like eating a knife. And that's fine to a certain degree. But if you let it go on long enough without giving them some space, they will learn very quickly that the only way they can have fun is if you are involved.
"I dunno, let's just get drunk or something. This sucks."
But After That, You Realize ...
That is an absolute disaster for an adult because it is physically impossible for us to put the rest of our lives on hold in order to make sure our child never experiences simple boredom. Learning that Mom and Dad aren't going to be there with them every second of the day is one of the most important lessons they can learn right out of the gates. Giving them alone time, even when their restlessness has turned them into whiny pieces of shit, will trigger their creative side, because now they have to find something to do without an adult showing them how. This is how all artists and hobbies are born. And some government agencies.