I agree with the rest of your post. But if you were swayed by arguments that turned out to be correct arguments, then weren't you correct? I get what you're saying and I've already agreed the smart money is on the majority of scientists rather than the faction, but if you thought the faction was right and then the faction then turned out to be right, you're right too. If you still don't agree, then I guess we'll have to agree to disagree on this one.
You're free to feel smug about guessing who was right, but I won't call
you right for believing some arguments you didn't actually understand, and disbelieving others you logically shouldn't have. If you did actually understand the arguments involved, then great, but then you aren't a layperson either.
Obviously "I was right" has different meanings, and if something you said turns out to be true, you can try saying that phrase, but I'm free to respond with "no you weren't, you just had a lucky guess". There's no sense arguing semantics however, so just to reiterate what my stance is: you're can have an opinion on a scientific debate (I love having opinions on scientific debates!), but as soon as you take yourself seriously, you're wrong. Of course I'm saying this more absolutely than I think it is, there's nuance and conceivable exceptions and stuff, but I think it's generally a very good rule.