“Yes, this is jingoistic; the idea of a handful of American tech giants controlling much of society has helped push regulators internationally to try to limit their power. But we would almost certainly do the same if a bunch of foreign companies attempted to take over our economy. At least it’s our own giants that we have to fear.”
I take very little solace in the idea that a tech monopoly is somehow less dangerous if everyone involved happens to be from the same country. There’s no upside to a lack of choices.