And if it's an opinion on things like "should it be legal to have sex before marriage" or whatever that's fine The problem comes when you have 5 civil engineer

And if it's an opinion on things like "should it be legal to have sex before marriage" or whatever that's fine The problem comes when you have 5 civil engineers saying a bridge is not safe, and 50 random members of the public saying it's safe. If we treat those opinions as equal, we end up with a bridge collapsing.