> What you are suggesting is akin to suggesting that fascism and democracy are both the same
You've taken dictatorship and equated it with fascism. I'll assume you didn't intend the bait and switch there, but it's not necessarily the case.
It's worth remembering that not all democracy is good, and not all authoritarianism is bad[1]. California's proposition 8 banning homosexual marriage was a democratic decision, while supporting the arts through encouraging the establishment of People's Houses[2] was an authoritarian one.
The point that I believe the grand-parent was making is that a lie in support of a goal that you like is not better than a lie in support of a goal that you don't. Both are lies, and shame on whomever proffers them as fact. If your position is indeed the superior one, then you shouldn't need to result to lies to bolster your position.
That said, it's been well established that unions, democratic or not, are not always acting in the best interests of their members. We've seen this time and again with kickback cooperation, compelled membership, disallowance of disassociation, corruption, etc.
I'm not necessarily invested in the debate here, so please don't take my position as arguing for or against either side, but as I recently mentioned elsewhere, if your position is that "unions are good and companies are bad", then you've fallen prey to ideological confirmation bias, and are disinviting nuance from the conversation, which limits the effectiveness of said discourse.
It is indeed "not that simple".
[1] - https://en.wikipedia.org/wiki/Benevolent_dictatorship
[2] - https://en.wikipedia.org/wiki/People%27s_Houses