If Alphabet allows a non-US competitor to replace them, isn't it their fault for failing to compete? The threat of replacement is supposed to be what motivates Alphabet to innovate.

It could also be argued that allowing Alphabet to sustain anticompetitive damages is exactly what creates the opportunity for them to be replaced. Alternatives to AdSense and YouTube can only succeed in America if Alphabet rests on their laurels and is artificially defended from natural price competition.