“Good” doesn’t apply to man before Gd raised him. Man was an animal - animals are neither good nor evil, but live and die according to the rules of Nature - as ordained by Gd, but that’s beyond the scope of this discussion. Once Gd got involved, Man became aware of good and evil, thereby becoming capable of both. Once that happens, there’s no putting it aside; you are “made” in the “image of Gd.”
When Man erred against Gd, he had to be put out of the Garden and the warning was “Now you’ll be an animal again, subject to the wayward whims of Nature. You’ll suffer mentally and physically. You wanted to be in charge? Now you are! Haaaaahahahaaaa!” *slams gate*
Adam: Can’t we talk about this?
Eve: I’m cold!
Adam & Eve’s kids: We’re hungry!
Whether it’s “okay” or not for the rabbi to suggest that we’re good - you never know, he might have just been messing. He’s out here with the rest of us miserable sinners, so what does that tell you?
Or, you could go by Scripture and regard that God expelled them from the Garden to protect them from themselves.
They already proved they were not trustworthy and had they eaten of the Tree of Life, they would have lived forever in an unredeemed, corrupted state with no chance for redemption.
God expelled them to protect them and give them another chance, not be as vindictive as you appear to think He was.
Besides, rebellion is not “erring”. Man chose to rebel. It wasn’t a mistake.