Does something need to be different or new to be good? I think there's a time for challenging people and expanding their horizons, but there's also time for reminding them what they already value in life. The more ways we find to say things that are true, the more that people will believe them, and the more they can identify with people in the past who felt the same way. It's too easy to get caught up in the drama and the mechanical business of life, and forget about all the reasons why putting up with all of that is worth it.
I agree though, that whatever good poetry is, it needs to be something that people can identify with.