To treat what you wrote as counterpoint to previous commenter you'd have to claim that inventors are far less knowledgeable, experienced and younger than musicians.
Not really a song might take a week or 5 mins to write but its the result of years of experience and hard work - your not going to write "September Song" at 18 are you
You would be ok with your employer using the same argument when they paid you ?
Argument was that inventors are less protected than entertainers. Why the guy who invented neodymium magnets has monopoly for 20 years while Britney Spears has pretty much indefinite monopoly on less than 4 minutes of content that she sang when she was 17 or sth.
John Ruskin: 'The labour of two days is that for which you ask two hundred guineas?'
Whistler: 'No. I ask it for the knowledge I have gained in the work of a lifetime.'