Why should healthy people not go to the hospital?

In daily life, many people feel healthy and don't need to go to the hospital, but sometimes this subjective feeling can deceive people, because there are many diseases, in the early or middle stage, the symptoms are mild and nothing special, even if they feel a little uncomfortable, they don't care at all, and they may develop into serious diseases in the later stage. So it is necessary to go to the hospital for physical examination regularly.