Speaking from a non-physicist perspective, much of what the QM sequence helped teach me is helping see the world from bottom-up; QM is regular, but it adds up to normality, and it's normality that's weird. Delving down into QM is going up the rabbit's hole away from weirdness and normality, and into mathematical regularity.

By analogy, normal people are similarly weird because they're the normality that was produced as the sum of a million years of evolution. Which in turn helps you realize that a random mind plucked out of mindspace is unlikely to have the characteristics we attribute to humanlike normality. Because normality is weird.

Once you go from bottom-to-top, you also help dissolve some questions like problems of identity and free will (though I had personally dissolved the supposed contradiction between free will and determinism many years before I encountered LessWrong) -- I still think that many knots people tie themselves over regarding issues like Quantum Suicide or Doomsday Dilemmas, are caused by insufficient application of the bottoms-up principle, or worse yet a half-hearted application thereof.