Regulation - which is based on force and fear - undermines the moral base of business dealings. It becomes cheaper to bribe a building inspector than to meet his standards of construction. Protection of the consumer by regulation is thus illusory.
Mr. Market is kind of a drunken psycho. Some days he gets very enthused, some days he gets very depressed. And when he get really enthused you sell to him, and if he gets depressed, you buy from him. There's no moral taint attached to that.