Union workers get paid a lot more than non-union workers. Regardless of if they have a college degree or not, the same holds true.
This shows why unions are important.
But both my uncle and stepfather who work in Construction hate unions. The unions are evil because they take money in dues out of their paychecks each week, their hard earned money. They also have falling for the rhetoric that unions are bad for our country and no longer needed.
Pointing out what great healthcare benefits the unions offer them at no cost and the wage differences between union and non union workers does nothing to persuade them otherwise. They still believe they would be better off without unions.