Right, union workers were shot at and bombed fighting for the rights that we take for granted today.

Another way to look at this is that there hasn't been much progress in the labor market over the last ~50 years. Wages have been stagnant for that long, states introduced legislation that neutered unions and organization is at a comparative low. Given the trend of replacing employees with contractors who have less rights and benefits, you can even say that we're taking steps backward compared to where we were not too long ago.