There's certainly a sense in which this is true: attempting to enforce equality of outcomes certainly does kill liberty. But not all the inequality we see in the world today is the result of free choices: much inequality is created by state privilege. The example that should be obvious to any Bitcoiner is the way banks benefit from being close to the proverbial money printer, as well as bailouts and government-enforced restrictions on competition. I think it's an open question whether we'd see more or less inequality in a truly free world.