They are able to very deliberately select what words they use and therefore what image they attempt to show
See, from that perspective I'm currently in character typing this post, which isn't true at all. The difference between this post and the way I'd say it in real life is that if you were talking directly to me I'd be pausing to select those words.
It's a tough argument, and I see where you're coming from but the statement that an artist is always writing in character is a dangerous one; in broad strokes, it seems to assert that artists are either always firm in their beliefs on an unsavory subject or they never really mean it. If it's the first one then we're making claims about people that may be outright lies, and if it's the second one we'd be letting odious people get away with nasty shit without having the right to call them on it.
The fact is, whether or not an artist is writing in order to reflect a particular worldview isn't as important as whether or not the artist is writing as somebody else. Isolating one facet of your personality and coming up with lyrics from that perspective is an entirely different act than isolating someone else's personality and writing from that.
EDIT: Personal example. I'm writing a song right now called "Be A Man." I'm writing it from the perspective of a man who doesn't really respect women or anyone else and instead seeks his own happiness first and foremost, and he's actually adressing me. I'm intending it as a critique of the general attitude I see in my province, city and university. It starts with these lines:
You some kinda faggot, son
I don't understand where you're coming fromI don't call people "faggot," ever. I find the term incredibly distasteful at best and outright harmful at worst, and I doubt that on this forum I'd have to go into reasons why. But the worldview I'm writing from in this song isn't my worldview.
I've also written a song very recently with the lines,
These songs were meant for a singular "you,"
Somebody different, somebody new
The first time we touched, talked...Which is, especially for me, incredibly direct. I'm writing this song from my worldview. It's me, completely unmasked, and I doubt it's hard to figure out the meaning behind those lines, no matter what context they're in.