I mean, the whataboutism is a critical tool in negating propaganda. Rather than focus on the reprehensibility of anyone using threats of violence like this to force specific outcomes favorable to domestic policy, everyone is instead hung up on the fact China did this.

Whataboutism, used effectively, is meant to draw parallels rather than excuse behavior. Fuck China for what it's doing here, but also fuck the countries and entities who have used similar tactics in the past to great effect. Don't just conveniently put on blinders for what's happening/happened at home all because the government-labelled "baddie" did it too.