He was just starting out in film when WW II broke out and he did take the opportunity to duck enlistment.
He did, however, serve in many other ways, raising morale like few others could. Not every man can be a Jimmy Stewart or Clark Gable (both served in uniform.)
Damn right he ducked enlistment. And Jimmy Stewart and Clark Gable were twice the man this macho pretender was.
And that argument about alternate service swings no weight with me.