The bottle may be shattered
But it's the message that matters
So if it washes on your shore
Don't join the roars
Of clashing egos and crashing bores

Roger Gall 1997

As the point of both song and poetry is communication - does not the detail and form of how the idea is written, presented or performed matter far less than that the idea is conveyed? After the original idea is conveyed, many knowledgable critics may subsequently be able to identify the meter that a poet has used or the tune used by a songwriter and to suggests ways that it could be improved.