I'm not so sure. To paint with a broad brush, Americans love fast cars and don't care too much for cycling. There's always been a large motorsport culture in the US.

DTS was a big part of the F1 rise in the states, but it is but one part of the story. Things really started to change when Liberty Media acquired F1 and brought in new management. F1 needed to make the sport more accessible by opening up on social media, giving away broadcast rights to ESPN, adding more race weekends both in the States and abroad, and of course (re)introducing the sport to many via Netflix. Which is all to say that there was a full on effort and strategy by the sport to change with the times.