Star Wars battlefront isn't that great a game, poor character mechanics imo. My DS and I have played it together, he would have been 14 at the time.
I have gamed for 40 years Pong in a video arcade started it and then a home pc before some people had even touched a computer.
I attended a RG University and am a librarian so hardcore gamers can do well educationally. My DS and DD followed suit, she did well and he has just had some of his mock GCSE results back all A or A* apart from one B. So poor performance does not always go hand in hand with gaming.
But I do agree that RPG games do take over lives sometimes in destructive ways.
It's all about self control, one of my friends who lives in the states was online at an odd time, when I asked he said he was towards the end of a 17 hour gaming session.
COD is actually rubbish these days and not worth buying, Battlefield 1 is the best military shooter currently.
If anyone wants a game recommendation for adult gamers try Ghost recon. Really great game play, no RNG and clear objectives.