I don't get it. If a very, very dangerous flight technique can not be trained out of somebody, then that pilot should be grounded. Regardless of the strength of the vertical fin.
The pilot is not completely to blame here. Look carefully at the breakout force issue and compare it to a Boeing. Or compare it to a trainer. Responsive rudder action is required on some aircraft and many trainers. There's also the issue of the Va specification. The aircraft in question was flying below Va, which by definition allows lock-to-lock control throws without breaking the aircraft. After the accident Airbus qualified that to mean one excursion to lock and then back, not multiple cycles. I'd appreciate some input on this issue from the more experienced pilots on the forum.