Well, a round just went by earlier tonight where medical was entirely destroyed, so usually most of the crew are in fact worried about antags.
10 sec vs 2 traitors isn't fun, sec being outnumbered isn't the issue, it's sec being vastly outnumbered, especially considering the current inexperienced sec playerbase.
I gagged.
Having a duo of officers vs. a dozen traitors with uplinks allowing them to access p-p-p-p-POWERFUL WEAPONS isn't very fun for security. People wonder why security mains don't stick around, and also actively balance the game to make playing security as frustrating as possible.