I worked in a non-right-to-work state. Unions prospered. Once the union gets control everyone pays dues. They don't have to be union members but they pay dues. It's like a job tax. I was a union official for while and had take care of some very unpleasant business with management. I took a lot of crap from supervisors for no other reason than I was a union official. I got the idea that it was mostly a big dog contest in which I had no interest in. One of my actions got a supervisor terminated. Fortunately management tried to keep the union happy. They did that because the unions contributed heavily to the campaigns of Democrats. Democrats ran the government.
I truly saw both sides of the equation and abuses from both management and the union. I agree with right-to-work laws. If a union truly has something to offer an employee, unions will exist. If they don't they won't exist. Probably the reason unions have been on the decline in the private sector for a long time.