What you said doesn't make sense to me. The elites are running higher mileage, which is poor training? Or by elite are you talking about Brazier only, who is doing "poor training" but running 1:43.5.
Running any amount of steady-state or "aerobic" mileage is poor training. All 800m specialists at all levels who run mileage are training poorly. Elite status is a consequence of elite genetics, not elite training.