While it’s based on anecdotal evidence, we can conclude that the medical crew do occasionally request low altitude due to the condition of the patient. It is irrelevant if that is a researched fact or an opinion of the medical crew, the flight crew will anyway do their best to heed that request if it doesn’t add unproportional risk to the mission.
Flying at 500” AGL when in day VMC is usually not an increased risk for competent crew.