I bring this up regularly. Trading a doctor for a doctor seems like a fair enough trade & many folks want mobility. The irony of “if you don’t like it here, then leave” being met with your & other nations making it exceedingly difficult to do that. I know several folks would love to have my US passport but where I am at, I would get a lot more value & ease in having a local passport form entry to nearby countries, to visa woes + residency, to opening accounts (dealing with the IRS+SEC means many, many places refuse service), dual pricing, & actually getting some semblence of integration.