Good question
@Jimmy Todd! In my opinion, no, songs that depict a wonderful image of romantic love that's hard to attain don't do more harm than good. In fact, I think they're important for people. They help people.
Why? The best answer to that I can give you is this excerpt from a Stevie Nicks interview:
Interviewer: Does it also make you angry that you are very vulnerable?
Stevie Nicks: No, because if I'm not vulnerable I won't ever write any more songs about vulnerabiity and then what am I doing? I need to help people. I need to make people believe that it's alright to be vulnerable and to be a little naive and to be still be sweet and kind and good."