Since startups make things and things are the essence of the economy, gain the skill to make things rather than telling other people to make things.
If you are a master at business administration then you are a master at telling other people to make things, why would I want you to tell me what to do as a partner in a startup? You have to pay me for that kind of stuff.
My impression, working for a Fortune 500, is that management is largely an information processing task. They are gathering, analyzing, and communicating information, but typically have to deal with both quantitative and qualitative information of varying quality from disparate sources.
They are also skilled at certain kinds of tasks such as creating business plans, budgets, etc., and serving them up in a recognizable format that other people can use.
Supervision is a different kind of task, some managers are good at it, others aren't.
Hopefully your business grows to the point where you need someone who can perform these tasks for you.
Certainly, the ability to make things was what got my business off the ground. I'm still a one man shop, and my sales don't justify hiring myself full time, much less another worker -- management or otherwise.
management is largely an information processing task. They are gathering, analyzing, and communicating information, but typically have to deal with both quantitative and qualitative information of varying quality from disparate sources
This layer is going to be utterly destroyed by machine learning when it goes mainstream. The value of an MBA is trending towards zero.
Even machine learning isn't necessary. All that's needed is more widespread communication. For instance, my boss doesn't need to communicate the company's strategy to me, because I can figure it out by sharing information with workers at similar companies.
If you are a master at business administration then you are a master at telling other people to make things, why would I want you to tell me what to do as a partner in a startup? You have to pay me for that kind of stuff.