In food terms, ordinary exams are something like a main course, while "top-tier" exams are more like side dishes. On the other hand, while the sides may have more tantalizing names, spending a chunk of money you didn't need to spend isn't that big a deal, whereas failing to discover a cancer early and missing the chance to treat it before it grows would be awful.
換言之，一般健檢是「主菜」，高階健檢則是「配菜」，雖然配菜聽起來名號響亮，但若主客易位、本末倒置，花費大筆冤枉錢事小，若錯失癌症早期發現、早期治療的先機，才更令人扼腕。