Being a business mogul has never been a qualification for being the President of the United States. That is because the United States government is not a business. Being able to run a business, grow profits, and expand a company is not synonymous with being able to run a complex federal government that oversees 50 states.
The position of the President of the United States has almost universally been the purview of generals, law experts, and community activists and organizers. In short: people who have experience in governance and truly care about policy.