Is creativity the product of an all-inclusive group effort or a small, specialized team? Do great campaign ideas come from controlled groups, or does "the more the merrier" apply to creativity?

Visit the 4A's Smart Brief, which has a link to the following blog: https://digiday.com/marketing/ban-brainstorming/

 

In it, blogger Mark Duffy laments the fact that firms are moving from a small team approach to a brainstorming method for creativity development. He asks the question, "Does a 'storm' create, or does it damage, destroy and kill?"

After reading Duffy's comments, consider this scenario: If you were in charge of developing a communication or advertising campaign, would you want input from a specialized team or an all-inclusive one? In detail, list at least three reasons for your choice.