I find it unbelievable that this even needs to be said, but here goes:
The point of education is not to fill your head with facts, dates, numbers, names, words, and grammar constructions that you will never forget and will be able to reproduce, like a perky little parrot, 30 years later. Educators are not in the business of training parrots or creating competition for the Google search engine. Surprise!
The actual purpose of education is to develop your capacity to think, read critically, form logical connections, construct arguments, reason, and experience the need to grow intellectually for as long as possible. Educators are not always successful in this project but that’s the goal.
Everything else can be done by Google. Or trained parrots.
This is why asking “But what was the point of taking that class on math / history / politics of medieval Spain / Japanese grammar, etc if today I remember nothing from the material?” is a very stupid thing to do.
And to finish up the post with something less self-evident: today is Friday.