If you haven't been in a position where workplace tyranny and abuse of power don't seem so high stakes, you are fortunate, but your experience is not universal or necessarily typical.
Not high stakes as in you won't be killed, your family won't be shipped off to a labor camp, etc. if the company president turns out to be a malevolent dictator.
You really think it's worth it to encumber all companies with unions because of a few bad eggs?
No, at worst you might just might end up living on the street, without healthcare. Or just humiliated and broken down daily.
Sure I do. What's the downside, someone might tell you not to plug in your own computer?
You think it's worth it to have people spending the majority of their life in an environment of tyranny, abuse of power, humilation and degradation, no democracy in the environment you spend most of your waking hours in -- because some unions might tell you not to plug in your own computer?
In the U.S., healthcare is tied to employer. That, coupled with low amount of savings most Americans have, does make it into a life and death situation.