If writers are so opinionated about their works value, they just need to charge a fixed price. The allure of the possibility of writing a song once and having

If writers are so opinionated about their works value, they just need to charge a fixed price. The allure of the possibility of writing a song once and having potentially massive perpetual income is why they like these royalty deals (and why said lawyer knew it was a good deal). But that's more of a lottery ticket in todays music industry. However, if you assign a price to your work you will quickly know what it's worth.