But I think it is very convenient that it applies to the work these people want to consume (which should be free), and not to the work they perform (which should be paid).
Why should the software engineer be paid but the author not? Why is the written word information but not the code?
I would trust the motives more if there was a general coherence to it all, beyond the consumption of media. Information comes in many forms.
There’s a very big Open Source / Free as in Freedom / AND Free as in Beer contingent on HN.
For example, the Lawyer example is used often - once the lawyer makes the argument, it's in the public domain and can be used by others, but you still pay the lawyer to compose the argument. There are also models where the durable software artifacts are free, but you pay people to support your use of them. Then there are the older models that used to be used a lot in the music and art world. A wealthy benefactor (or in this day and age, crowd) pays for a trusted artist / musican / architect / coder to create something, both for their enjoyment but also for their fame and renown.
When a fence is built around the apple tree, it is a restriction on the ability of the apple tree to spread its seeds and on those that desire the apples, both.
I don’t personally have a strong stance on this particular issue, but perhaps this analogy will help you understand the view of people who believe that knowledge should be free.