Yes, occam's razor would suggest the government randomly decided exactly now was the time to start working in our best interests, and also those interests are super secret and have absolutely nothing to do with recent geopolitical happenings nor anything to do with the stated beliefs of the politicians driving the government.
This is take is so naive. Tiktok is the equivalent of CBS, NBC, FOX and ABC all being owned by the US's largest threat/enemy's government.
Chinese nationals are banned from even accessing TikTok within China in addition to the Chinese government not allowing America media apps to compete their market.
There isnt an argument in the world that this app isnt bad for US interests and the only reason this is emotional at all for people is that it took too long for the government to act.