The logical upshot of liberalism's hatred of hypocrisy is that it is better for the liar to champion lying, the glutton to advocate gluttony, the adulterer to celebrate adultery, than for someone to preach the right thing if he himself occasionally does the wrong thing. Better to let your failings define you and be happy about it, than to let your ideals define you but then fall short of them, for that opens you up to the charge of hypocrisy.