It all depends on who your audience is. Some people only care about the lyrics. Some people don't really care as long as the singer has what they cosider a good voice. Still other people only care about HOW the singer sings - dynamics and such. Tool for example. The varyations of this go on forever.
IMO, it is far more important HOW you sing the words than what the words are actually about. Some of the most emotionally charged vocals ever recorded (again...my opinion here) are nonsense words. It's just pure emotion, pure comminication coming out.
I don't think lyrical meaning is all that important as long as your emotion is coming across - and the words are TOO cheezy....
IMO, it is far more important HOW you sing the words than what the words are actually about. Some of the most emotionally charged vocals ever recorded (again...my opinion here) are nonsense words. It's just pure emotion, pure comminication coming out.
I don't think lyrical meaning is all that important as long as your emotion is coming across - and the words are TOO cheezy....