I've argued this before. I mean, I don't like sports games at all but I know a good one when I see one. I'm not the biggest FPS fan but I can appreciate what goes into one (and I actually do enjoy Call of Duty and Halo quite a bit). I don't like sim racers at all but I can see why people like Forza and Gran Turismo.
And then, there's the guys that, when asked the question "What's the worst game of all time", instantly reply:
Halo
Gears of War
Uncharted
Mario
What. The. Fuck.
Just because it doesn't appeal to you doesn't mean it sucks! There's a lot of movies that can't hold my interest but I can acknowledge that they're good for their respective audience, right? Same goes for games! If the game isn't broken, the gameplay is solid, the graphics are great, the story is good, why hate? Blows my mind every single time.
