I have no idea what they teach in MBA programs these days - I'm many years removed from the age that most people get theirs.
My dad got his MBA in 1959. When I was younger and considering one (I moved out of day to day tech work a long time ago because I wanted to "fix" the business problems I kept encountering because of their negative impact on the tech work), we reviewed curricula for several programs.
My dad was pretty astounded that in the wake of globalism and technology, they were still teaching the same tired-ass theories that he was taught in the 50's. Note that this conversation wasn't all that long ago in the grand scheme of things.
I get that this is a vulture capital site but all one has to do is look at what is happening in the world (Bain capital et al) and you see that all they are really teaching/practicing is wealth extraction, not wealth building.
Edit: sorry, my dad got his BS in 1959, his MBA in 1962.