What danger was he ever in? When was he under fire or attacked by the enemy? He was targetting the enemy from several hundred feet away, concealed and camoed, and could pick off enemies at will. That is precisely how he secured 160 kills.
I am not saying he was a coward. I am saying what he does does not involve courage. Courage involves facing some danger and meeting that danger because it is the right thing to do. He faced, at best, minimal danger. What he did do was show comradery, honour, obedience to duty, et cetera, all of which are praise worthy.
But snipers aren't paragons of courage. Just as say, drone operators aren't paragons of courage.
Maybe you're watching the wrong movies?
There were snipers aboard the helicopters shot down in "Blackhawk Down".
"Lone Survivor" was in a sniper team. And yea, those were dangerous missions with lots of deaths.
You saw one movie, and want to generalize about snipers.