By definition, capitalism is inhumane. Even if you are worried about the market looking unkindly on your accural of capital, you're doing so in a fashion that prioritizes their perception rather than actual virtue.
You are right that democracy can reign capitalism's amoralism in, but so can any other form of government. I don't see why the same can't be said for communism, beyond the standard "it hasn't happened before".
You mean: It has never happened once, no matter how often tried. How many communist experiments, how many ruined lives will it take until you and your kind finally get it? But I know the answer already ...
You are right that democracy can reign capitalism's amoralism in, but so can any other form of government. I don't see why the same can't be said for communism, beyond the standard "it hasn't happened before".