Earlier quoted context omitted.
> We deserve to have input into how we work best and if that means walking away from companies run by egomaniacs that need to see butts in seats, then so be it. The logical conclusion of this line of thinking is to organize your coworkers. You have much more bargaining power about your work conditions as an organized union. The history of unionization stems primarily from workers demanding safe working environments.
> You have much more bargaining power about your work conditions as an organized union. You also give away your power as an individual to those running the union.
As the other comment mentioned the biggest individual power you have is quitting and a union doesn't prevent that.