It’s not a bias on the educational side, it’s the inherent requirement for knowledge before you can learn skills. Memorization creates a Rosetta Stone the enables people to start reading. You need to know what happened historically before you can have meaningful opinions about it. You need to memorize mathematical symbols meaning before you can use them etc etc.

The only bias here is people disliking memorization. It takes effort and has concrete right and wrong answers so you can fail in a way that doesn’t happen with skills. But disliking something doesn’t mean it’s actually wrong.