What is the point of all this factoidal knowledge

Here is an example of what I mean. There is space in my limited brain that contains "really important" information like this:

Teddy Roosevelt, as a child, suffered from asthma

I am sure that this is important, but couldn't I use that space for other information of a more practical nature?

We all have brains choked with trivialities galore. At the same time it seems like the stuff we really don't want to forget, like what date do we get our business taxes done, gets shoveled off to the brain's basement almost imeadiately.