I think your approach for evaluating political economic systems is sound, and it’s worth pointing out that, despite decades of unimateral embargo from the us, Cuba has some of the best doctors in the world. They developed their own covid vaccine. From Wikipedia:

Cuba provides more medical personnel to the developing world than all the G8 countries combined.

I think it makes a strong case that a political system oriented towards common good can overcome crippling material restrictions imposed by a hostile neighboring superpower to provide free, high quality, universal healthcare.