Khan’s followers — Why loyalty & no initiative?

[CoveTom]

For most of their life, Khan was all they knew—mostly younger folks.

They got dumped into a space battle sight unseen—no time to plot a coup when your head is spinning.

Of course, not originally. In "Space Seed," Khan and his followers were all mostly the same age, which makes sense. But in TWOK, they are all miraculously far younger than Khan.