Maybe that's why they will never come up with the next Apple/Google/SpaceX/etc.
Every single MBA I have met, without exception, has been extremely good at talking and making presentations. Ask them to do real work, and they will find a million excuses.
Another thing I have noticed, is the kind of people attracted to doing an MBA. They have seen all of Steve Jobs' talks/speeches, talk incessantly about Brand Building and strategy. Ask them to dial for dollars and you get radio silence.