That reason is no worse than the inverse reasoning: gleefully supporting the investigation because it threatens Google's future.

Also, I think the reasoning is independent of the specific situation. Working at $PLACE could benefit the poster. So the poster wants to see $PLACE continue to have a bright future. Seems like a standard argument for capitalism and the free-flow of human capital to better jobs.

I understand there are externalities that affect this specific situation, hence the investigation, but since it's not clear there's antitrust behavior, it seems premature to classify the reasoning as bad.