That's not QUITE it.
The issue is that everyone is insisting that there is a DIFFERENT "right" way. So of the 30 or 40 "right" ways in a group of 30 or 40 people, there has to be some system for settling on 1 "right" way. So what ensues, without anyone consciously realizing it, is almost an election. Where the group settles on one "right" way. And any holdouts are said to be difficult intransigent people.
It's a bit like a court jury. All 12 jurors actually have their own opinion. But over time, they select one opinion as the consensus opinion. The reason for selecting that opinion can be different for each juror, but any juror not accepting the consensus opinion would be considered a hold out. I'd even wager that the other jurors would just as soon not be on a jury with the hold outs in the future.
Having mentioned all that, the material point here is that every initial opinion in the group can be "wrong". The consensus opinion is only the opinion that the group promotes as its own. Being the consensus opinion doesn't mean that it's correct, anymore than being a dissenting opinion means that the dissenting opinion is correct. It's entirely possible, in fact oftentimes likely, that both opinions are "wrong".