I would like to argue that traders will always be necessary. The bulk of a trader's job is indeed automated. However models only work within their specified boundaries, and there are plenty of cases that require trader intervention. Also what you are seeing more of is that traders generate the ideas and logic that is used to fine tune these algorithmic models.
Thank you for the feedback! It is incredibly stressful and honestly I left because I was seeing how it affected my personal life and vice versa. To be a trader, you need to lead a simple life.
General stress coping methods however are the basics - 8 hours sleep, 1 hour exercise everyday, socialise once or two a week and have family time!