very nice attempt!
mankind searching for this answer from ancient time. One thing is confirmed that the human brain has some limitation. like you said, If you ask 5 people who have successfully completed this process, then it is more likely that you will get 5 different answers, according to their own Belief System. means the purpose of life is subjective and changing over time according to this experiment. as all physical and psychological laws applicable to all humans equally so I think the purpose of life should be equal for all. means a lot of different answers we are getting from this experiment should be united somewhere. maybe a lot of beautiful answers from this experiment are matching with a spiritual base like your answer.

So, I think we have to try to find the exact answer in a spiritual way, anyone should read religious books, learn from great people or prophets before declaring himself or herself an atheist. because as science neither tells us our origin nor our destiny. so we have to put our belief in somewhere supreme power called as God.