There are so many fascinating aspects of our human hubris and exceptionality exposed here I hardly know where to begin.

First off, humans have decided what behavior is "too complex" for another critter to learn on their own. That's completely arbitrary - or rather, completely human-centric.

Second off, bees are hive creatures and not much at all like humans in that way. But the experiment is measuring whether bees can behave like humans in how they learn from one another - individual to individual. So again, it's about us, really.

Third, our base assumption is that other critters do not have cumulative culture, and then we see if we can show that they do. Because we say we do, and that makes us special! What if we assumed they do have cumulative culture, until proven otherwise? See again first item above, how would we have any idea what behaviors are "too complex" for even another mammal, never mind an insect from a hive-mind species whose experience of living we have absolutely no way to relate with, to learn by themselves?

Last for this comment but not least, how "we" in our white colonizer mind-body-separated alleged "rational" culture think about humanity is really an aberration in the long sweep of human history. A great variety of aboriginal/indigenous humans in many different parts of the world over tens of thousands of years have thought quite differently about humanity. We could learn a lot from them, along with from bees and all our fellow mortals.