Probably because they seem to have the most egregious examples based on works that seem to everyone else to be pretty successful?

"the Tolkien estate sued New Line, claiming that their contract entitled them to 7.5% of the gross receipts of the $6 billion hit.[23] According to New Line's accounts, the trilogy made "horrendous losses" and no profit at all."

I think most people would find it surprising that both Return of the Jedi and the Lord of the Rings movies failed to make a profit?

https://en.wikipedia.org/wiki/Hollywood_accounting