There are some things you just cannot do as king. You can’t be common or petty. Relationships determine integrity so careless ones are out. Actually, careless-anything isn’t an option—where thrones are concerned self is secondary to the realm. Kings behave as kings even before the position is granted; at any point you can spot them based on conduct. Poised.
God said David is king; I have rejected Saul from being king because he has become wise in his own eyes and has determined to do things his own way. Saul realized he was out and in un-kingly manner pursued David through the wilderness rocks and strongholds, determined to deprive him of his kingly presence. Pointless.
The problem with Saul’s logic is that a king is a king no matter what, or when. The low place difficulty does not reduce them, the height of opulent power does not woo them. A king is a king and, basically, owns it all anyway. A king is a king no matter where they are, or how they’re treated. It’s what inside–the birthright, the inheritance, not common, not profane, un-coerced. Kingly.