It isn't the number that were drafted that matters. It is the number who were enrolled who might have been drafted that matters.

For maybe people, even one would be too many.

For others' sake, I double-checked: 2.59 million served, of which 648,500 were draftees. Right at 25%

Is there a study of soldiers who enlisted but only because their draft number was low? There were substantial benefits to enlisting, because you could choose your branch of service.