If he's an O-6, he's certainly looking to improve his prospects for getting his first star. Combat Action Medal would certainly help. Even an O-5 may have been looking ahead.
We don't know how strong a driver that was for him going into combat, but in this case, he certainly earned it. Not knowing the guy, I'd give him the benefit of the doubt.
There's a long history of staff officers (especially those with political ambitions) "exposing" themselves to combat to gain a medal to help their promotion or election prospects. During WWII, brass would cadge rides on bomber raids and get awarded an Air Medal on their return. The Navy did something similar; note how Lyndon Johnson got a Silver Star.
Ron Wanttaja