> The only downside is that you pay more in fees

This is a _huge_ downside for index funds, though. Even quite a small fee difference has a huge compounding impact over time; people often miss just how much.

AIUI, assuming you're investing in a global equity fund, currency hedging is almost never worth it. It _may_ be worth it in some cases if you're investing in a foreign index (eg S&P for Europeans), but even then not usually.