Capitalism requires coercion to function. The ‘incentive’ is goddamn starvation and being exposed to the raw elements with no shelter.
You're thinking of nature. It's nature that does that.
And it's what we humans are fighting against, the natural order of things. Nature doesn't care about the weak, it doesn't care about justice. We're in a battle to design and build systems that we can install on top of nature and which do provide those things. There is still much to be done, but over the course of human history we have accomplished a lot and we are in a better place today than we have ever been.
The term capitalism has become a meme, conveying little meaning, just a word we can invoke to rally others in a brief cathartic moment of finger pointing and doom-saying. If it's what you want to do then fine, go ahead and when you finish, wash your hands and clear your mind, then come back and help think of positive steps forward we can make as a society.
Throwing freighters in there like that is a bit sneaky lol The amount of freighter traffic must dwarf that of cruise ships. Anyway, people on cruise ships are mostly not particularly rich. They're pretty much just water-borne holiday camps.