Well there isn't a world-government yet and which else government should nationalize these US companies? Of course, in the long run, we need to use these democratically across the whole world.
Eight billion people couldn't care less what kind of the US elites own their* stuff. If the author really thinks these companies owed something to the entire humanity then the article should start with "open weights" or "compensation for the entire humanity" or something like that, not a transfer of ownership inside the US.
*according to the article