Every guy who's had an engine failure said the plane was easier to fly than the simulator. We assume it's the slight pitch, roll and yaw forces you can feel that a simulator cannot completely replicate.
It's NOT about engine failure, it's about genuine replication of the effective thrust vs. environmental conditions, leading to a (what i presume) all too favourable simulation.
For risk and cost reasons simulators are the way to go.
I agree with the cost, but with less training in the real beast, the risk increases, no matter how much you try to simulate,