Since when are sitcoms supposed to be realistic? It's TV! If you can't standing watching Friends because it's unrealistic...then what the hell do you watch?
Surely not Gilmore Girls - how realistic is it that Rory and Lorelai never gain weight despite the fact that they almost exclusively eat take-out and never exercise?
Or Veronica Mars - would a teenage girl who's actually caught the attention of the FBI a couple times really be allowed to intern for them? Who knows?
Grey's Anatomy? Where they all have their makeup intact and have no visible bags under their eyes after working endless shifts?
Oh, gosh, I guess TV isn't supposed to represent real life after all!
Kay, all snark aside, yes, it is far from realistic. But it's entertainment, not a documentary. If they lived in studio apartments and wore Walmart clothes, we wouldn't want to watch them.