What's important is that each and every one of us can decide for ourselves and not because some union has decided it should be so
Some union + Some company + Some employee who joined said union all were OK with the system till now.
Said employee would normally be quite happy said union is representing him because the perception in general seems to be that said company would screw said employee without said union representing his best interests. What is the point of them otherwise.
If the union is supposed to represent the majority then what else would you suggest?
Or are you implying that there is an inherent flaw in "democracy" and that the majority rule is not always best for everyone. Good heavens!!