East Asia is vassal to the US at the moment...
I think countries like Singapore, Korea, etc do not want the US, Korea, to leave. They are between a rock and a hard place and want to balance the US and China in order not to become too dependent on one and to benefit from both.
Singapore, which is quite "China-friendly" is saying exactly that.
What I find interesting is that the West in general, and obviously the US in particular, indeed cannot seem to imagine or accept that their complete dominance of the world is coming to an end. This is a rude awakening.
Singapore, which has an history of promoting "Asian values" and is a former British colony with 70%+ ethnic Chinese is very well place to tell us things as they are.