hey
would our music benefit from us to stop listening to other’s music ?
do you think that the human brain is able to create on its very own, without any help of chance?
I have the impression that, in some extent, it is only able to make combinations of reminiscences or what you have already heard sometime, and make out what sounds good or what sounds bad (based on your tastes, which are steming from what you have been musically exposed to …)
So the process of learning to create music, or getting better at it, would be the learning of some set of rules, of which you are aware (music theory) or not. I don’t think the fact that someone practice music for years would have for consequence that he has a “better” imagination, but maybe he would have a wider “knowledge base”/overview of what sounds good and how to reach it.
By stopping listening to other’s music, maybe you restrict yourself to the access of what others have already found to be working (or not). It reminds me mathematics, learning proofs permits you to be better on others issues, not to be more limited in your way of thinking.
Maybe it is only my point of view and it is because I am a novice in music creation (so my musical thinking isn’t very much developped), but I have the impression that every time I would have composed a pleasant melody, I would have to charge chance’s account, certainly not some sort of reflection (that is where the parallel with maths stop). Some people are able to compose on paper, without physically hearing the music, but isn’t it always the process of trying and judging ?
All of this is my opinion, and “not totally” on the topic of this subject,
hoping not to do barroom philosophy and not saying too much bullshit 
sorry for the bad english