It's very violent because it gets violently repressed by capitalist forces. See the democratically elected Allende being couped by the CIA.
> Capitalism only makes people rich if they provide loads of value to others.
That is straight up not true. What value do people inheriting wealth provide? What value do high frequency traders provide? What value do speculators of all sorts provide? It's a casino that's rigged for the already rich, on the back of the poor.