These aren't bad bosses or people who don't know how to run a business. They just know if their staff unionized and the rest of their industry didn't, they wouldn't be able to compete on price or keep the necessary number of staff.
I think it's easier to pick on Amazon or bezos than it is to deal with the political forces that you've mentioned, or come to terms with needing to unionizing a whole industry before it would stop hurting small businesses.
Management has no reason to oppose changes that cost them nothing with or without a union. In an industry with thin margins, anything that does cost them money puts them out of business. Meanwhile a union that can't achieve meaningful concessions is collecting dues for no benefit, requiring the company to pay more to retain talent and thereby putting them out of business just by existing.
It's funny how the US is often presented hyper innovative, and economically dynamic, while at the same time it is claimed that basic issues like universal health care and workers rights - problems that are solved in many other developed countries - are intractable in the US because of "thin margins" or "the deficit".
Pro-labor operates under the false assumption that employing a small number of well-paid workers is better for society than employing a large number of lower paid workers. Let's say Walmart could afford to pay a "living wage" by replacing their shelves with pallets, laying off most of their shelvers, and redistributing their wages to the other employees. Would that really be any better?
As unions usually live on either/and employee dues and government grants, making sure both the company and the industry overall is doing well is in their best interest, as otherwise the union will certainly not be alive.
So would be useful to see an example of a union NOT wanting good for the company/industry as that would be an outlier compared the the rest of them.
I submit that if business can't exist without a government subsidy that allows them to pay their employees less than a living wage, then the people running the business do not, in fact, know how to run it.
I don't like this fact, and this obviously isn't going to be true for every industry, but these twee 'truisms' don't accurately represent reality.
This is false.
I own a company, in America, and I'm trying to convince my employees to start a union. It hasn't happened yet, but I'll convince them one day