To me, chiptunes are fun and light and not serious.
To me, string quartet music is downbeat and gloomy.
Of course it makes sense to generalize when most chiptunes indeed are upbeat, fun and light, since they come from an arcade game tradition of trying to draw in players with happy sounds, but all chiptunes won't be this way, and you can find utterly depressing ones if you want to as well - so your generalization still looks silly to me.
And yeah, that's all, I just wanted to be elitist

EDIT: also, I'm not really disqualifying your actual critique or anything - I love me some bright clothing and funness and lightness, so I like that suggestion. I'd have done it.