As a finnish person I will never understand anti-union arguments.
The culture of workers unionizing is so deep in our bones that it just feels weird when someone is against it.
It gives voice to those in objectively worse negotiating position than their employer, it gives support when there is need to fight for your rights as an employee, it gives sense of community and it protects against tyranny from the side of the employer.
Let's just be straight about it employees can't be equal in negotiations when compared to their employer. They need the much bigger voice and wider shoulders of the union to level the playing field.
I have posted about this before, but I just drank whiskey and came up with more things that I wanted to say about it so here you have my outsiders perspective that probably isn't worth shit outside of Finland .