I think we should consider why this experiment worked. It is reproducible, btw. But why?

Humans are social animals. We actually have neurons in our brains specifically laid out in circuits that help us recognize patterns and mimic them. It improves social cohesion and allows us to function better as a herd. If you've ever watched wildebeest run or fish school and watch these incredibly elegant movements, or watched how they collectively attack predators, shield their young or vulnerable, etc, you've seen similar hard-wired behaviors in vertebrates. It's an adaptive advantage.

Humans, however, also have this incredibly overdeveloped (relative to those other examples) frontal cortex. That's the override portion of the brain. That's the part that processes the reflexes and the hard-wired behaviors and gives us the option to more thoroughly analyze a situation, and override it. In other words, that's the part of the brain that allows us to think critically. That, too, is incredibly adaptive. We're far more sophisticated and nuanced in our reactions to stimuli than most other critters. We're not nearly as predictable as prey and we're better hunters. Again, all of that improves survival.

But, that runs contrary to the herding instinct. So there's a balance. Too little social cohesion from too much override and we end up with anarchy and the tribe dies off from various threats. Too much, and we end up locking in maladaptive behaviors which also get the herd killed. We're constantly balancing this.

This experiment just shows the behavior in practice. The study subject just goes into that more primitive thinking, follows the instinct to conform, and dutifully teaches the behavior to the next generation without the front cortical override. Given that she's Asian, she comes from a culture that encourages this. In America, of course, our culture deliberately discourages this. So, as you can see, this isn't purely biologically controlled. There's some "nurture" as well as "nature" in this trait.