But planning involves central control and central control means that individual control is given up. No capitalist enterprise will give up individual control for any reason, and particularly not if it might reveal their secrets. Planning and control of capitalism is impossible. Even at the top of a boom, businesses will accept a falling rate of profit, selling at cost or even below in order to keep customers and protect market share. Eventually, the falling rate of profit makes itself felt.
Production is halted.
Capitalist production goes bust, leading to a recession or even depression. Such crises are inevitable under capitalism, like day follows night. This has gone on for almost 200 years. Every time they try to shift the blame onto some particular problem. No doubt there are specific problems, but making adjustments here or there will not prevent the next crisis.