All right to work does, is allow you to go to work at a business, even if it is unionized, and not be forced to join it. Union bosses hate this, because it can cut into their pockets with membership dues, and gives employees the right to think for themselves. That scares the unions, they do not want you thinking, as you might actually decide they are retarded for striking over every little thing. It won't destroy unions, but it will help bring their power and greed in check.