Shift the focus onto why Cuba was and is still materially poor (its pre-revolution agrarian plantation economy and all the horrors that went along with that, the ongoing embargo and economic warfare the US has waged against it, and the loss of its primary trading partner in the 90s), and how the impact of the Cuban communists has been to reduce that poverty and to mitigate the worst effects of it, to ensure that even when food is scarce people still have food, that they have healthcare and education, that even in rural areas people have housing when they didn't before the revolution.

People definitely emigrated from Cuba for economic reasons just as countless more people emigrated from capitalist Latin American countries for economic reasons, but with Cuban immigrants the worst poverty they describe is shit that's normal for the worst areas in the US as well, whereas immigrants from capitalist Latin American countries are fleeing genocidal death squads trained by the US army, they're fleeing cartel violence (and the footsoldiers of the cartels are primarily former military who were trained by the US army), and they're fleeing poverty that's far worse than anything Cuba has faced since the revolution (except perhaps at the absolute worst times in the 90s).