You did a good job of researching. As a resident of Japan, I was impressed by some of the things you said, but I also thought there were some things that were a little off.
* I've never heard of the so-called "lolicon boom" ending in 1984. What happened in 1984? Did Hideo Azuma stop his doujinshi activities and return to commercial magazines?
* Hideo Azuma has already passed away, but that doesn't mean he was a lolicon. He is married, and his daughter, who works as an illustrator, has a Twitter(X) account that you can easily find by searching (and she respects her father very much).
* I think that their expression through their doujinshi activities was, in their own words, a self-deprecating expression that "we are perverts who are aroused by the ink stains of pictures." Or maybe they simply wanted to draw manga with content that couldn't be published in commercial magazines. The reason they were able to do that was because the existence of lolicon was unknown in Japan at the time, and there was no social label that said it was "despicable" like in the West. At most, it was within the scope of the word "pervert."
* Japan is a rare region in the world where Christian values are not the foundation of society. Japanese people don't believe in the nonsense fiction that "the God who created this universe is very concerned about the sex life of a species of monkey living in a corner of a small planet" (they believe in a different nonsense).
* I think most Japanese people are missing the context I wrote above that they do not have a Christian moral foundation.
* Don't you think it is completely nonsense to classify paintings as "this one is 10 years old," "this one is 1000 years old," "this one looks like a girl but is a boy"? The age of a fictional character in a mere painting is entirely the artist's self-declaration. A painting can be expressed as anything, and that is what makes it fiction.
* It is depressing when society or a government official establishes morality about what is healthy and what is not, using arbitrary standards.
Why did Nazi Germany declare the paintings of Edvard Munch and others to be "degenerate art" before the war and banish them from the art world? Because they thought it was "unhealthy." If you think Nazi Germany was a "healthy empire," then you may argue that there should be legal restrictions on lolicon art as well.
* I don't understand why people get so worked up over a mere ink blot or collection of pixels that make up an image. If you want to say that "it's dangerous because there are people who can't distinguish between reality and fiction," then what about people who preach "fiction" like God, heaven, and hell, and kill others for it?