I have given this great thought and prayer.
Many will be resurrected who were not Jehovah's Witnesses and have the opportunity to worship God and HE wills, not as you or I will.
I will, however, discuss more about the first part, i.e., your saying that Genesis is an allegory. As I said, I have given this great thought with prayer. Before I started studying the Bible with the Witnesses, I finally prayed after many years. I would say for years I did not believe in God. He was nowhere to be found, as far as I was concerned despite my looking into and visiting different religions. And finally after many years I prayed because I wanted to have faith. And lo and behold! I finally began to listen to what Jehovah's Witnesses were saying. (Still fought with them for a little while, before I would slam the door on them until then.) Frankly, no matter where I looked before that, I found nothing. By the way, the word 'day' in Genesis obviously means more than a 24-hour period. Aside from reality, the word day in the Bible can mean periods other than 24 hours. Something like, "in Shakespeare's day..."