You can be great at one phase of your life. Motivating people, working 20 hours a day, sleeping in the office. Probably Tesla would have gone under without Elon pushing, motivating, and showing his investment (meaning of time and energy).

It doesn't mean you are a statesman, a scholar, or all knowing. About anything.

It also doesn't mean that you can solve every problem you encounter in life with that kind of behavour.

Tesla as a company is an impressive accomplishment. Elon does sound crazy, however.