It absolutely does not mean that. Unions help set minimum standards, not maximum ones.

I've worked in private companies where the maximum comp is set by management and they do not allow individual negotiations. And I've worked in heavily unionised organisations where I was able to negotiate a better deal for myself.

Do you really think your unique talents will save you from a lecherous boss or protect you from being discriminated against?

And, if you wanted to sue, how much will an attorney's retainer cost? Hint - probably a lot more than you Union dues!