Just saying "sometimes right, sometimes wrong" is such an oversimplification that it's meaningless.

Yes, almost all real world systems have variable outcomes, that doesn't mean that are some aren't better than others or on average produce better outcomes or ones that drive us in the right direction.

I.e. a system of strong regulators with clear and strong checks and balances (courts and parliament itself), is a far better system than one where corporations are just allowed to operate freely and implement whatever policies they want the instant they have the market power to do so.