Aside from the common sense that collective bargaining obviously puts you in a stronger negotiating position than individual bargaining for the same class of job, there is also plenty of data out there showing that unions deliver results. Anti-union people counter that by flooding the discourse with FUD propaganda that is often very persuasive but just because it's persuasive doesn't mean it is true.
Collective bargaining is 100% better than individual bargaining.
But, collective bargaining is only a single aspect of unions. They're not voting against it because they dislike collective bargaining, but because of other reasons. Collective bargaining is likely not a significant motivator for them because their salaries really are fairly high for the area.
I think in many cases unions are good, and in many others they are bad. I disagree that you can point at overall data and use that decide a specific case. Union data likely has severe survivorship bias, since unions likely tend to exist where they are more helpful.
That might be true on average, doesn’t mean that specific cases could have vastly different outcomes.
I don’t see how a propaganda campaign can push the vote to 70%, this is not Soviet Russia. Money does help but not on this order of magnitude (see Mike Bloomberg or many failed ballot propositions with tons of money behind them).
They had anti-union propaganda everywhere, even in the fucking bathroom stalls. Plus it's a very conservative part of the country that has been drowning in anti-union propaganda for decades on top of the fact that the average moderate American swing voter is also pretty hostile to unions and even a good chunk of the center-left side of the Democratic coalition is too.
Pro-union people have a lot of work to do to restore the reputation of unions more generally. We need to up our propaganda game a lot because we got crushed in the Reagan era and never recovered.
The unions asked them if they wanted to unionise. They said 'no thanks'. Why isn't that enough for you? If you support workers' right to have a voice then listen to them when they use it. Some individuals are even quoted in the article - they want the unions to leave them in peace!
I don't know your life experiences but I think you've got a funny idea that unions are some kind of perfect good descended from heaven? In reality in most cases unions come with a lot of unpleasant people and politics and aggravation. The workers are already seeing that aggravation with all this unwanted attention. That's one extra problem than they had before, and they don't have any confidence the union will reduce any problems they already had. And the union wants to be paid hundreds of dollars a month for the privilege! What a joke and no wonder people are hostile. I bet people are going to be even more hostile at the next factory these unions turn up at.
You say "leave them alone" like fighting to improve people's lives is somehow victimizing them. It's truly amazing how right-wing anti-union propaganda has brain wormed into so many people.
If someone tells you to leave them alone, then you should leave them alone. If at that point you don't then yeah you're harassing them and they're a victim.
From the workers' perspective, there is an endless supply of people who will offer to take their money or the little power they have in return for supposedly 'fighting to improve their lives'.
Most of them do not really share your interests, and many are actively trying to trick you to use your money and power for themselves.
See for example the majority of politicians.
So far this union has uninvitedly hassled these workers for months, and then reacted angrily when they said 'no thanks' in a vote, so I can understand the workers are not buying now even if they were considering it before!
Unions have a long track record of working well to raise wages and improve working conditions. But I suppose that's not easy to know if the only info a person consumes about the topic is right-wing propaganda.