Using everything would be like taking a bunch of students final exams and then claiming the most common answers are the correct ones.
This isn't how expertise and accuracy works. Most things worth doing are not only genuinely hard and complicated but something that only a minority subset of accomplished people can do consistently well in.
Listening to everybody and incorporating their thoughts is only going to lead to wrong answers.
Being selective is the key here unless you genuinely want say, answers about to space to involve aliens and UFOs - because way more people believe in that then there are qualified PhD astrophysicists in the world.
Similarly, way more people believe in vaccine conspiracy theories then there are people with significant viral epidemiology backgrounds.
This pattern is true in every field.