This is consistent with the authoritarian right’s advocacy of the unitary executive theory – the codification of the Imperial Presidency where the president may rule via fiat unchecked by Congress, the courts, or the people.
It’s an important component of the right’s desire to destroy democracy and establish the tyranny of Republican minority rule.
As for DeSantis’ position with regard to diversity in the military, DeSantis is a hateful racist and bigot – as president he would clearly pursue a policy where racism, bigotry, and hate would be allowed to flourish in the military; yet another example of why DeSantis is unfit to be president.