do you believe they have to be perfect representations of the finished product and if so why?
Yes
The reason is quite simple - and has been covered numerous times
If you are submitting songs to publishers, labels, artists, managers etc. then you are entering the music BUSINESS
Your song is your "pitch"
The people that make decisions about whether to use a song are BUSINESS people - they are not musicians
You would be pitching against professional writers who have sessions musicians and studios at their finger tips - as well as a potential proven track record
So if you want to enter this arena you not only need an amazing song but it must be the "finished product"
A good example is a CV when applying for a job
Would you submit a hand written, tea stained, dog eared, piece of paper full of spelling mistakes
OR
Would you present yourself in the best way you can by typing it up and making it the best it can be
Both would contain the same "information" but one may stand a better chance of success
It is exactly the same with submitting demos - if you don't believe in your song enough to make it the best it can be by hiring a studio and session musicians why should a publisher believe in it and invest in having it re-recorded
Times have changed and submitting a "pop song" as a guitar & vocal recorded using an iPhone will not stand as much chance as a fully produced demo
If the song was good enough there is obviously still a "chance" that it would get picked up but in any competitive environment you need to ensure that you do as much as you can to help with success
I can actually make a burger that tastes better than a McDonald's burger but I haven't been able to achieve global dominance by writing to people asking them to taste it and build a multi-million £ empire using my recipe
- apparently I need to invest in myself to start with
If a publisher successfully agrees a deal with an artist and their management team, would they then not want to re-record it themselves, possibly in a different key, tempo, with different instrumentation maybe, recorded with professional musicians/producer in the style of the artist to give it the best chance of success?
A song may well be re-recorded (although elements of an existing demo often get used) BUT the artist/label wll want to hear a demo that has been professionally recorded
This is just how it is now
The decision to make is do you believe in your songs enough to invest in them yourself? - either by paying a studio/producer to turn them in to "radio ready" songs or learn how to do it yourself