Why does Xisha wear platform shoes?

the road is uneven. Yagong Island in Xisha is composed of corals and shells, surrounded by swarms of corals, so you have to wear platform shoes when you go ashore, otherwise you can't walk, and you often take a speedboat from a cruise ship to the island reef, so you have to wear shoes with heels and non-slip shoes. Wearing thick soles is because the islands and reefs in the South China Sea are coral reefs, especially when wading by the sea, platform shoes can not only quickly discharge the seawater and sediment entering the shoes, but also effectively protect the soles of your feet from being pricked by coral residues in the shallows.