I’m not sure how much different military experience is from executive branch experience. The President is at the top of the military chain-of-command … President --> Sec. of Defense --> Sec. of the Army --> General of the Army … similarly … President --> Sec. of State --> Undersec. of State for Asia --> Lacky in the Povertonia Embassy …
If the Undersec. of State for Asia defies the President, there will be consequences … kinda like if a Captain defies a Major …
I would say that military experience is more closely aligned with executive experience than legislative experience … Obama was the first President from the Congress since JFK/LBJ … them’s a ton of years for sure for sure …
Unless there’s any other President with strictly business experience … then the second least qualified President would have to be George Washington, since at that time no one had ever held such a position … no one had any experience for the job.
Both Nixon and George H. W. Bush’s were Senators before becoming vice president, and in those days it was hard to say how much of an office that was. Ford was in the House for decades before becoming President.
Hoover was a millionaire businessman who could afford to retire early and turn his attention to do-gooding. Carter was famously vilified as a “peanut farmer.”
You said this earlier, Loach demolished it earlier, and you acknowledged his demolishing it. Time for a hefty dose of ginkgo biloba.
Besides, by this standard the only non-President qualified to be President was Benjamin Harrison in his second, non-continuous term.
I think historians generally regard him as a terrible president. He was elected in a fervor of excitement over winning the war, without people thinking about whether he was really qualified to be president.
ETA: Of course, he also presided over a very difficult period in history.