Why doesn't VIZIO just comply?

Not necessarily. Apologies, sincere mea culpas, and concrete steps to prevent further missteps go a long way towards defusing anger. Courts have been known to take that into account. And in a practical sense, accepting such steps encourages more cooperation in future cases, while being a shrill absolutist wins no favors and only encourages desperate and vindictive resistance from future transgressors.

One need only look at the difference in combat zones or current ICE ventures to see it play out in real life.