"It's a lot more nuanced than I had initially thought"
Most things are a LOT more nuanced than most people give credence to, and there's zero dishonor in acknowledging that. With almost every issue I've delved into (especially political ones), there are arguments for and against any given issue that I can't hand-wave away. I might prioritize some factors ahead of others, but just about every political issue in the world is a matter of tradeoffs, and there are very few obvious wins.
I agree with your assertion here that much of the strengths to be found in capitalism revolve around the notion of resolving power imbalances. For every good story I've read, somewhere, there's a terrifying story -- I'm reminded of the old Hazard county mine worker strikes, for example.
But while unions are ostensibly the surest fix in mitigating those power imbalances (in fostering leverage to the people), the more I look at them the more I realize that they need to be truly cooperative. Union power is real enough that there are places like Sweden which have no minimum wage, and yet still have high effective wages. But in America at least, unions with political power often exploit that political power towards complacency, corruption, and often trend towards being less effective stewards of their member interests. In essence, too much cooperation between unions and policy makers may yield counter-intuitive results that manifest in ineffective unions, which yields declining memberships, which yields power imbalances in favor of corporations.
The point, if I have one, is that while so many people get wrapped up in the idea of "unions bad" or "unions good", we lose the ability to objectively evaluate whether a given union is good or bad because we ideologically insist that they be a certain way. Similarly, evaluations of government, corporations, regulations, trade, capitalism, socialism, et al all falter as soon as we begin to put too much faith in the institution that we stop performing scientifically objective and individual evaluations upon them.
Thanks for the conversation, and in particular, for the open mind. It's always a pleasure to engage with someone who I know to be willing to adjust their opinions to facts, and while capitalism surely isn't always good, it definitely isn't always bad either.