well, i think a lot of this falls into what 'god' is, first off, and, then secondly, what is 'good'. First, lets give an example of a 'good' thing to do. Lets say someone is having a hard time with something, they really need some advice, they are beat up. So, this person is having this problem, you see are very troubled, but, are worried about saying the wrong thing to further upset them. You listen to this persons issues, and then come to the conclusion the 'good' thing to do would be to affirm this persons beliefs in that moment to comfort them, easing the pain. What if however they really needed to hear the opposite? what if they just needed to hear this thing that 'worsened' their mental state to get them to see, but, the perceived 'good' thing to do was to comfort them. See how that is. Stay with me
Adversely, and to look at how good and bad can be maybe are next to the same thing. Say like saying something very harshly to one person, maybe you didn't even know for sure why you were saying something to this person, but, everyone around you would have the impression of, 'wow, this person seems to really be troubled, what a bad thing to do to this other seemingly sweet person'. Therefore, you have now done a 'bad' thing. See, but, maybe in that moment, this was something you really needed to hear, maybe the perception was 'bad', but in reality, it wasn't 'bad', or 'good' it was just what needed to happen, it was 'right'. How do we decide that? well, we wouldn't not entirely at least, we would allow it.
Can we be 'good' without 'god'? sure, we can be 'good'. If you read the Metu Neter, it describes a spiritual society of egypt in which the people are very 'good'. How do you want society ordered? what 'rules' do you follow and what will be 'good'?? Who is laying the cards down? Yes, i think it would be very easy to be 'good' wthout 'god', but, would it be 'right'. thats the question.