Since it's not market optimal, after they note the extra profit, why don't they lower the prices or hire more workforce or expand? Or at least share the windfal

Since it's not market optimal, after they note the extra profit, why don't they lower the prices or hire more workforce or expand? Or at least share the windfall with employees indirectly boosting the economy total, including their own position? (Yes, equilibrium economics is a joke even when law of big numbers is involved.)