Any hobby can become a problem the moment it interferes with your duties, though, like homework and work. I think it's safe to say every hobby at some point will do that, because it's something you love to do so much. Keeping yourself in check can be hard, but that's not "because of the game", or whatever other hobby you enjoy, but because of you. I have been weak in that, for sure. Funnily enough everyone was completely OK with that when it was my writing hobby - hours upon hours every single day writing, and my parents would be proud and possibly understanding that my grades dropped. When it was gaming however my entire environment completely collapsed on me and "intervened".
Anyway, it still angers me that everyone will be understanding if you can't come to the club tonight cause you have a match coming up tomorrow, but that everyone will raise eyebrows and possibly drop all contact with you because you can't come as you have a raid tonight.