Desmond Sander asks:
You say: “There is no other heat engine that can convert heat to work more efficiently than the Carnot Cycle. It is the perfect heat engine.”
I ask: How about Rafa Nadal? Does he not convert the kinetic energy of the oxygen molecules he breathes (and other molecules in food) to the motions of his body which make him a great tennis player? Is that not a local increase in entropy, similar to the local increase in entropy that other individuals like you/me achieve so long as they are alive?