I highly disagree with looking for the widest set of opinions. Some opinions are stupid and/or baseless and just muddy the conversation (that’s part of how you get screaming talking heads on cable news shows).

Personally I look for those with expertise who speak to their expertise. Just because someone has an advanced degree in one field does not mean their opinions in other fields are worth listening to. Also, I do a gut check. If is smells like BS, such as unfounded blanket statements or it seems like they’re pushing/selling something, I look into their qualifications a bit more or find someone else.