I'm not assuming that. Any amount of research could be no research or close to none. People who have done very little research shouldn't opine. People who have done lots of research are more likely to be correct.

News flash: it is possible for informed people to disagree.

Well of course. Someone who's barely informed can disagree with someone who is far more informed. That would be two informed people disagreeing.

If someone has done adequate research and I'm correct, they must agree with me, otherwise the amount of research wouldn't be adequate or I must be wrong. I can avoid being wrong by avoiding having strong opinions on things I don't understand or know much about it.