Not so sure about that. Anthem Blue Cross already reversed a decision about anesthaesia coverage [1]. And this killing is already likely to inspire a lot of people to ask questions about U.S. healthcare and demand a better system. So I actually think that just this one killing will already effect change.
1. https://www.nbcnews.com/health/health-care/anthem-blue-cross...
Fox News is covering the change in CEO ambiance as you note. But, Fox News is conspicuously failing to acknowledge the public reaction to this vigilantism compared to their Carlson-era spirited sympathy for Rittenhouse. To counterpoint more specifically, I think Fox News promoted Rittenhouse as a sustainable way to affect change (via ratings).
We’ll see how Fox covers a trial. Shouldn’t Thompson have known better than to walk without security? What did United know about threats to him? Why was the pool of suspects so large, and how did cops go from bewilderment to finding a needle in a haystack?
Oh? I think it would be rather effective—and no one expects it to be sustainable. One killing and the establishment media is already very clearly terrified. History teaches us that the only language understood by those who hold power is the language of force.