Smart people active in a field usually aren't bought or wrong. They can be but as a rule they're not and even if they'll typically know a lot more than I do. And nobody stops me from knowing more than one smart person in a field so I still get to play 'multiple sources'. Agreement you can have on facts or on opinions. Agreements on facts are easy as long as whatever you are looking at is stationary or can be looked at again, outside of that it is always going to be a matter of consensus. Disagreement on opinions outside of discussion forums where people usually don't come to have their minds changed - particular subreddits excepted - are usually fruitless and a complete waste of time.

Social media posts, both-sidesism (aka the false middle), people claiming to live in a place where some event happened (or did not...) doesn't move the needle factwise. It's all just different degrees of hearsay and that does tend to converge on 'what you agree with'.