I want to take issue with "Every dollar earned is a good dollar" at essay length. It's widely believed to be true by devs starting SaaS companies and sometimes dooms good people/products by e.g. makin them scramble to find 50 $20 a month accounts when they'd sleepwalk to 3 $10k a month ones.
I normally like your comments, but I believe the OP addressed this. They said the opportunity cost is the creator's time, which I believe takes into account your objection.
(Of course, responding to the a standalone phrase, you're absolutely correct)
