Americans have been taught to disdain unionisation, but in my experience they have very strange and idiosyncratic opinions of what unions are, or do. US labor unions never had the position in society that European ones do, and Americans are always happy to dismiss as unworkable that which has not been made to work in the USA.
Unions don't work in exactly the same way the universal healthcare doesn't work - it works everywhere except America, where it doesn't work only because the right wing have persuaded people to believe that it cannot work.