I dont get what your saying. Do you mean that if some was to study Art History that they wouldn't be able to play Rohan due to the heavy study load? (BTW, I used Art History as just an example that not all forms of art are just a "Hobby")
Its not impossible.
I work 2 jobs (one being my own business) and study 25 hours a week and can still log in Rohan and derp around. Granted, I dont spend half as much time in game as I used to, but its still possible to play..