When factoring the costs of displacing from the 744...in addition to the simple cost of each training event, we've got to factor in the potentially much higher cost of not being able to fly the schedule due to manning issues.
Some fleets are already at or near capacity even without displacements. The 717 pipeline is already maxed out. Adding more training due to displacements is impossible. Then management is looking at canceling flights. The real and intangible costs of that outcome would likely exceed the training events themselves.
DALPA has some leverage here. Will they use it, or "constructively engage" it away?