How do the nurses know where to send the triage without a broad medical education? This has been tried and fails, and when it is fails it is not pretty. Nurses

How do the nurses know where to send the triage without a broad medical education? This has been tried and fails, and when it is fails it is not pretty. Nurses will just refer their patients to 2-3 specialists in a shotgun approach, while at the same time missing "can't miss" diagnoses that never get a referral. Medicine is not tech support with tier levels :( I would stick to talking about things you know, because medicine is not one of them.