I believe you think too highly of the moral strength of the officer core.

if there’s an officer that refuses a command from President Trump, they will be made an example of immediately court-martial, have their family harassed, Possibly having to retroactively pay back loans or any other beneficial arrangement that they have received as part of the officers station, have all of their benefits rescinded immediately, their names will be publicized. The Maga crew will descend on them and make their lives hell. Within a week no other officer will even think of refusing a command or order from the president.