Because that knife is double edged . A union is no better than the organization it’s chartered under and can be just as bad , greedy , dirty , corrupt , spiteful , detrimental to its members as the company its “ fighting against “ . I’ve sat on negotiating committees as a chief shop Stewart and listened to the lies from the company and as a supervisor for a different company that treated the employees well so they wouldn’t bring in a union . I don’t get trying to compare unions to the 2A though , one is a right , one is a choice .