Profit is fine, but when distribution costs drop to near zero they still charge the same overblown amounts.
If they simply lower their price to a amount no one would care to spend their time downloading, then it would be over today and P2P would mostly die.

NOTICE TO RIAA: If you want to kill P2P, quit paying lawyers millions and lower your price so it's not worth it to download when you can get a nice packaged product for a reasonable price.