> And while unions aren't homogenous, they generally don't protect incompetence
They tend to insist on due process for adverse actions, and management tend to hold out the idea that being able to dismiss arbitrarily without evidence or process is essential to efficiently dealing with incompetence.
Your assertion tends to rely on your anecdata which tends to not be any more useful than anybody else's. I've known a huge number of people in various unions and this simply does not reflect any reality I've experienced in 25 years of work experience.
