Why did people think Jack would stay in the future

No.92690825 ViewReplyOriginalReport
A lot of people say that the show was about forgetting the past and rebuilding the future, and that Jack should have stayed in the future, but when has Jack ever considered this? He literally says he thinks about the past every day and the guilt of failing to save them almost drove him to suicide. (plus, its in the fucking intro)
It would have been extremely out of character for Jack to not go back to the past.