Regarding your other points:
1. That is a bad argument. Imagine that some people called collectors get to collect royalties from you every time you post a HN comment. Such collectors are paid for moderating comments. Some such collectors are wildly successful. Imagine that "commentright" law protects such people. If commentright law were to go away, how do such people get paid? (It's a fake problem, and copyright law is similarly no different.) In essence, if you love to write, go write, but don't expect artificial laws to save you.
2. To my knowledge, Amazon is not known to violate a preexisting GPL license. Amazon forks only things that were open in the past, but are now no longer open. In doing so, Amazon ensures the fork stays open. There is no license violation. If Amazon is making tons of money, it's probably because the software wasn't AGPL licensed in the first place.
3. This has already happened twice to me, and frankly, I am not worried. I can still carve out my limited focused niche.
I try to look at the bigger picture which is the picture of AGI, of the future of humanity, not of artificial protections or even of individual success. Your beliefs are shaped by the culture you were exposed to as an adolescent. If you had grown up in Tibet, or if you had tried LSD a few times in your life, or were exposed to say Buddhism, your beliefs about individual greed would be very different.