Earlier quoted context omitted.
Or Alabama? Which would never get a union... Unions are an aspect of a free market. They're an organization of individuals with a common goal in exactly the same way corporations are.
Unions are anti-free market. They are monopoly cartels protected by the federal government. If people who sell peanut butter joined together to sell their products at a higher price, the DOJ would bust them up. If people who sell labor join together to do the same type of rent seeking, congress sets up the NLRB to protect them.
Not to mention your argument should be that cartels should be legal, not that unions should not be.