No, I wasn't quite assuming you are anti-union, but that is one of the most common bits of anti-union propaganda. There's a true issue there but I don't think it's proportional to the amount of time this specific problem gets in these discussions.

I think it comes down to what you expect from people who are being treated poorly. Do you only accept "pure" moral acts as valid? Is small unfairness to a few justified to prevent large unfairness to many? It seems like we have different answers to these questions, but I don't think either can be dismissed as inherently against worker freedom or agency.

I care very very much about practical power for people who need it right now. I care a lot less about abstract freedoms that material conditions prevent people from being able to act on.