>>60909104
Because you never know where gains might come from.
TSMC is in the top 10 holdings of VWCE.
It's been 15 years of US overperformance, before that it was 10 years of US underperformance, following 20 years of US overperformance and 10 years of US underperformance and so on.
Even with the US overperforming, VWCE is up like +85% in 5 years compared to VUAA (S&P500) being up +105% in the same period. It's doing alright.