Playing any type of game like this is like any other thing we do to escape the daily grind. Whether it's fiction books, TV, Movies... etc. it's all a way for us to take a break from the pressures around us at work and home. That said, if playing these types of games becomes addictive then yes, it can have a detrimental effect rather than a positive one.
As with most things in life, every thing in moderation.