This is absolutely untrue. A kind of propaganda talking point that paints unions like some kind of vicious weapon that you want workers to have if they absolutely need to defend themselves against assault, but you'd rather not have the assault take place at all.
Unions give workers concentrated power to balance against the concentrated power of corporations. That's it. They are one side of the scale.
As for unions, everyone should unionize. It's literally the only way to even out the power dynamic. Good companies, bad companies - it makes no difference. There goal is to pay you as little as they can, so yours should be to get paid as much as you can. Unions make that process easier for the majority of people.
Pro-choice means every pregnant woman should have the choice and a real chance to abort their pregnancy if they choose. It's kind of right there in the name.
In the same way people say pro-union - they mean "pro-choice" as in you should have the choice and freedom to form and be part of a union easily.
I hope you’re trolling — you’re comment made me lol when I first read it because it’s so misguided.
Someone saying they'd rather not have their workers form a union is not pro-union. That's like saying you support workers sharing information but you would be offended if your workers talked about their salaries because that would infer that they don't trust you to be fair.