Radical repetition in MTR station names
Because radicals indicate the meaning of the character. For example, 銅鑼 literally means bronze (銅) gong (鑼). Both are phono-semantic compounds and metal-related – the 金 radical on the left side, and their pronunciation on the right side. The name 銅鑼灣 came from the shape of the bay, which is like a gong. You cannot remove any radicals, otherwise the entire meaning of the word would be unclear.