I disagree, and think small island nations do have much better chances. Otherwise we'd probably have great success stories in places like Andorra, Armenia, and Vatican City. I'm sure island countries to be more self reliant, with fewer major transport hubs that can be locked down.
Taiwan had high mask usage early on. That would’ve helped a lot in the US.
Testing was very successful, actually, in places like Singapore. Didn’t help that there was official discouragement of wearing masks followed by culture-war mask avoidance in the US.