Another point, if you want to go to PRC, for whatever reason, having a Taiwan citizenship really helps as you can just get a Taibaozheng and live and work there indefinitely.
As an American citizen however, it is getting harder.
But then maybe the OP is trying to work in the CIA and of course they would definitely not allow dual citizens. However, if the OP wants to work in the CIA it means he’s an American citizen, and I’m not sure I’d put America in the top 50 in terms of healthcare. Sure if you are billionaires but if you’re everyone else, even relatively affluent person, you are literally one cancer away from complete financial ruin. In fact you’d be better off just not getting treatment and willing your wealth to your heir…
And if you wanted to get into other countries, ones that aren’t all that friendly to Western countries, having a Taiwanese passport is probably a good thing.
I might add there is really no reason to renounce citizenship of any countries except for the US, mainly because of their authoritarian tax rules. Funny considering the US was founded based on taxation without representation.