There is a lot of knowledge (to which I count in particular all proven facts) that has no value at all for me.

For example, take every kind tabloid press. Well, at least the true part of it. Even then, I simply don't care whether some people who I don't even know cheat their spouse, had cosmetic surgery or whatever.

Another example are sports statistics. At least for me, those are absolutely uninteresting. Okay, memorizing them is a nice exercise for the brain, but so is memorizing hundreds of digits of pi, too. (which is also useless, BTW, because we need at most 35 digits of pi for any practical calculation)