Why, given the vast ocean of possible knowledge, would you assume I or most people would have any interest or benefit in that? Over something like geometric algebra, soldering or solving quadratic equations?

Human creations can be roughly divided in two categories, tools and content. Teaching content is pointless. Its selection is arbitrary and its value is roughly same and miniscule. Millions will choose Frotnite streamer over Shakespeare any day of the week. Math, physics, chemistry, foreign language are tools. Tools that the knowledge of can help you create whatever you desire, both content and whats more important and rare new tools. Native language classes, history, geography, even biology are very content heavy and very poor on tools. Thus they are mostly useless.