EM accounts for 1/3 of global economic output and, apart from India, is also historically cheap. And EM equities are not so strongly correlated with the USA.
I also see these uncertainties more as an opportunity as an investor. In the whole discussion about countries and sectors within an index, it is always forgotten: The weightings are constantly changing. After all, the USA has not always been the largest market in the MSCI World. About 30 years ago it was Japan, for example. China was also already more strongly represented in the EM index. So if everything really does go down the drain there permanently, it will also fall in the index. That is also a reason for me to invest in ETFs. This rebalancing happens automatically👌
I have the $XMME in my portfolio myself, but am considering switching to the $EIMI soon in favor of greater diversification.
No offense meant, but the mere fact that you ask this question is the answer in itself. I have found this time and time again with myself. If you seriously doubt your own fundamental doctrines, it is probably a good or very good investment opportunity...