Couldn’t be further from the truth, actually. USAF utilizes the sims a ton, even after initial qual as well. When I flew heavies we had quarterly EP sims (2 separate sim sessions to cover it all!), in addition to proficiency sims that were done at least once, if not twice per month depending on crew qual. We even did some “virtual flag” exercises that were done entirely in sims linked up with other units/airframes from across the country.