It's so wild. So many HN commenters have this exaggerated caricature in their heads about what a Union must be:
"Unions mean every worker gets paid the same!"
"Unions mean I will make less money!"
"Unions make it impossible to fire underperformers!"
"Unions are run by bosses whose incentives are different than workers!"
"Unions mean I can't plug in my own workstation!"
"Unions reward seniority over everything else!"
Like they've taken every spook story they've been told about unions, gathered up the worst parts, and then simply declare that unions, by law, must necessarily be all those bad things.