I went to business school instead of tech because I too dream of running the head of the ship one day. Tech will always be an interest but I thirst for freedom.
Running your own thing rarely means more free time than if you were working as a tech cog -- it often means much less free time.
If I was to estimate I would say that for every 1 hour you spend making big genius decisions, you spend 99 hours convincing people why those decisions are right, listening to why they are not right, listening to what you should be doing instead, writing reports or communications, listening to what issues people have...