LOLIllya: Not Want

Random semi-newbie question of the day: why is songfic looked down upon in some fanfic circles? I see people apologizing for it, or saying they don't read it, etc...

Anyway, I've got a scene in my missing scene (okay, that reads odd) that insists upon being songficcy - anachronistic songfic at that! - and I can't seem to write it properly while the back of my mind is wanting to apologize for its existence. Little advice, please?

Here's today's LOL... screencap from illyushadarling , "The Bridge of Lions Affair". Caption ganked from lolmac 's LOLNotWant series.