That statement needs to be challenged. The Montessori method might be great at small scale in an educational context, but that doesn't mean it's a great way to run a company worth most of a trillion dollars. Yes, empowering employees is good. Yes, having a few "coddled geniuses" to drive basic science or radical innovation is good too. OTOH, having every single engineer haring off in random directions all the time might not be so great. I believe this boundary-less freedom to focus on whatever's most interesting and ignore everything else is why issues like privacy and social impact have been routinely shortchanged at companies like Google and Facebook. We've seen where that leads. (It leads to some characteristic technical problems too but that's not the topic right now.)
"Don't be evil" and similar promises don't fulfill themselves. At FAANG scale, sticking to such promises requires a certain amount of focus and discipline every working moment, not just a few people spending more time on internal groups/lists than doing technical work. I know that's going to rub most employees at those companies the wrong way, but that doesn't make it untrue.
P.S. I work at one of those companies. I do know how they work, and I'm not criticizing for criticism's sake. I'm trying to get at what I think is necessary for me and my colleagues to better ourselves and do things we can be proud of.