I don't have much to say about this issue either way, but it's not as ironclad as you make it seem.

It's less trivial but people can and do renounce their US citizenship. It can be expensive, but probably not 2%-6% of you net worth in perpetuity expensive. Now, you will have to find a new flag of convenience, but you can do that from probably somewhere b/t 500K and 1.5 million in a desirable locale.