Over 1500 degreed architects and engineers agree with that premise.
reasons why you are incorrect:
1) it's "cool" to support the agenda which is anti-establishment....(so, of course 1500 say it was an inside job.....15 minutes of fame coming their way!!!!)
2) those "1500" are more than likely an unverifyable/fictitious group
3) simply because their degree says "engineer" or "architect" does NOT mean they have a clue.....(it's like presupposing that a "lawyer" knows the entire body of law....RIDICULOUS)
4) do you really believe that some clowns in US government could believe that they would be able to pull that off and no one would have a clue.....??