That's very true. Today's most intense jobs require originality in ideas and that's not possible in a group. Groups are good for commoditize-able jobs or jobs that can be partitioned orthogonally. Otherwise, for research or creative work, groupthink inescapably leads to lowest-common-denominator solutions that are almost invariably unexciting. You see the same pattern in research, where very few great discoveries are being made in pairs (and much fewer in more than 2 people groups).