Yes, that is about the single only upside to relying on US Big Tech rather than sovereign local tech. It doesn't nearly weigh up to the downsides, but it is a real thing. In Belgium's case though, even if every Belgian migrated iver to WhatsBelgian for their IMing needs tomorrow, given the competency of the government it would take at least a decade before they had things in place to read along.

Maybe I wasn't clear enough, the point was that all above things do hold for Korea yet are not at all the norm in the West.