As has been pointed out, we come from varied backgrounds and experiences. If you looked at the list of schools a "Green Beret" attends you might be very surprised, few schools are closed to us.
We are also selected from all services, ethnic backgrounds and nationalities, just about anyone can attempt to become one of us but few make mental and physical cut.
We are highly selective in who earns the right to wear the Green Beret and for good reason, there's only one unit in the entire US military trained to , live behind enemy lines, and overthrow governments, just one.
And I would agree there's very little an A-Team cannot accomplish if given the task.