If a person is seriously accomplished in their field, and honestly articulate, actually understands what they are talking about, and not just pulling a fast one, then they can be President. I don’t think Eisenhower was a governor or a senator, but a General. I think it depends on the individual and what they are truly bringing to the table. If they are convincing enough to get elected with the right principals, then they are capable of learning the Presidency.
IKE was the supreme allied commander during WW2. that is a pretty good executive experience. Moving and being responsible for millions of men, feeding them, transporting them, drawing up battle plans etc. Ike’s negatives if any was that as General he never had to learn the politcal skills.
I disagree that an anyone accomplished in their field that talks good can be president. the POTUS requires a certain skill set. Not everyone can do it. in fac tthe bigger it gets the less people that can do it which is a good argument to reduce the power and scope of the office.