Interesting perspective. I often get annoyed at myself for remember very little from my school years that's not related to my current career or hobbies (e.g. history, geography, English lit) and almost feel that I should learn it all again, but I guess if I don't actually use that knowledge I'd just be forcing myself to memorise facts for the sake of it.

Perhaps it is best that I just let it go and instead focus on learning new things that I really want to learn or that'd be useful for what I do/want to do?

Now if only I could selectively delete memories I could finally forget the time I ended a call to a client with "Love you, bye!".