What facts demonstrate the pilots are poorly trained? What facts demonstrate this was a case of simple runaway trim? What facts indicate control surfaces were damaged, let alone related to speed or improper control input?
What we do know is MCAS can so rapidly induce mistrim, that it's not possible to recover from at low altitude. No one was informed of or trained on this possible failure vector and it's not at all clear it looks like the kind of runaway trim they are trained for.
United 585, US Air 427, Eastwind 517. The facts there are this was the result of PCU malfunction causing rudder reversal. In the case of US Air 427 the pilots pulled back on the yoke the entire time, progressing the stall, and making recovery impossible. But the direct cause of the accident is still Boeing's responsibility, the instigating action that led to the crashes was rudder hardover due to a mechanical defect.
Just because pilots may have, with perfect information, been able to recover the plane, does not absolve Boeing's defective design and implementation for MCAS, the deception from the FAA, the lack of documentation about its function and malfunction in the flight manual or training materials, the lack of any procedure for its malfunction that would require additional training.
And now they're changing the behavior of MCAS in the case of angle of attack sensor disagreement, such that MCAS is disabled. That's a very clear sign that the previous behavior is inappropriate. And the ensuing change in airplane behavior without MCAS will certainly require additional training, the very thing they sought to avoid.