Because that's the impression I get from the other comments that you're responding here; That they have negligible impact on member welfare, but introduce a pile of corruption and bureaucracy into the mix.
That is some -really- strong hyperbole, especially against teacher and police unions as the parent is referring to.
I would argue that the benefits teachers get and the relative job security of police offices is a good indicator of a strong labor union for both roles.
Sure, pay sucks, but teachers would probably be treated worse than amazon workers at this point if they didn't have them.
Source: worked for ed tech startup that supported teachers. Also dated a few.
That I frequently hear how public school teachers are unable to do anything about literal abuse and such does give them credence though.
You should be better off ignoring comments from people you do not know, with unknown agendas, and without sources.
Amazon is well known for astroturfing and creating "fake" profiles: https://boingboing.net/2021/03/30/twitter-bans-fake-amazon-w...
That does not mean that your fellow commenters are Amazon infiltrates or the like, but they can just be repeating misinformation from Amazon anti-union campaigns.