ROM 2:14:For when the Gentiles, which have not the law, do by nature the things contained in the law, these, having not the law, are a law unto themselves
how much better to live a good life because you want to rather than because a law tells you to.
the fact that they accuse exJWs of justifying a 'sinful' course just betrays their own deep seated inclinations to break the laws they are bound by. (i.e. they are jealous that they are trapped and we are not)