Me camping out on your front lawn will never detract from your funds..
I'd have to pay to recover my ammunition, of course..
But seriously, you're comparing not getting perpetual compensation for something you wrote to invading your personal space? You could conceivably have your written song copied and distributed worldwide without even knowing about it. It's not a personal matter at all - you can't own words or ideas. That's why we call it copyright. It's a legal construct we invented specifically because actual ownership was an impossibility.
That said, they could simply work out a deal with the band (or bands) they sell the music to. 10% sounds good. Sure, without copyright, other bands could play and the writer wouldn't be compensated, but the original band will always do the best. If you need examples of this, look at the copyright situation in china. copies and (illegal) derivative work exist; the original makes the most money, the others, less.
Mathematics is the only science where one never knows what one is talking about nor whether what is said is true. -- Russell