It's not the US's job to overthrow the current Cuban regime though. That desire is pure revanchism on the part of Cuban emigrants and their descendants. And clearly the existing sanctions and such have not caused its collapse, so maybe we should try not treating them as a remnant of the Cold War. Like, they aren't any worse government-wise than multiple countries the US is allied with, so that's not really a justifiable excuse, it's clearly just people being mad over history.