All of us do this work in our free time.
No one gets paid for this.
Fact is, people who contribute to Rockbox work on what they want to work on, when they want to work on it, because it interests them personally.
It doesn't necessarily matter how good an idea is, or how trivial it is to implement, if no one has any desire to implement it it won't get done.
If you know you have the ability, as you stated, and you have the desire to see this implemented, then you are the perfect person for the job.
[Saint]