Interesting perspective. However what do you think forms the judgement of whether someone is a "good man" if not for some morally or ethically driven framework?
As already replied to Pou's similar question earlier in the thread.
If the question (as originally posed by I'mTheMan) is "Can you not just choose to be a good man
as best as you know how" then I would say the judgement is (for better or worse) an internal individual one, based on an individual's chosen values.
That is to say, that morals and ethics are essentially an individual matter - whether someone chooses to align theirs with any given religious framework (of which there are various different ones within Christianity alone), a certain social framework, a certain political framework, or an eclectic mix drawn from various sources - to decide what how they define what is moral, ethical or "good" to them to pursue.
This perspective can account for or accommodate individual differences, as well as differences in an individual over time as they are changed by experiences.