I agree with you 100% that games are a soft target. But the obvious 'hard' target which they ignored in this case isn't tobacco, but the television and film industries, aka the media. The reasons are obvious. As a government you don't offend the media industry when it has such powerful control over the airwaves and public opinion.
Actually that rule applies to everyone in the west. Millions of people from all parts of the population spend countless hours of the day parked on the couch, motionless, staring at a box each day. When was the last time you heard anyone suggest in public (or private) that maybe that might not be such a good thing?