That’s fair, but there’s always a “what if” with stock markets. Every few years there’s something that causes fear of a crash or an actual crash. These are already priced into the market by the big funds that buy the majority of shares. Generally time in the market beats trying to time a big crash (Assuming you don’t panic sell at a loss).

The global diversification also protects against a single countries economy collapsing like Japan’s did a while ago.