The specific reason tells us zilch. It's not a rule, it's not a tenet, and it's not an explanation of or method for how/when/where to apply the reason.
It has to provide what fits the definition of the word. You're throwing "insight" around with regard to the creative process like it means "every single decision ever made no matter how big or small." That's not what "insight" means. That's like me telling you I had an orange for a snack yesterday afternoon because I was hungry and you telling me it provides insight into my eating habits.That's a feature, not a bug. If the index is just to present complete and finished statements by the Giant that provide some arbitrarily selected level of "insight," I'd like to know that so I can stop dedicating time to it. But its purpose isn't limited to that. But as of now, at least, it's "meant primarily to provide easy access to direct statements from the author for the purpose of forum discussion." If that's not the case, the rules should be updated to reflect it.
Might the huge combination of data eventually give you some insight? Yes, which I suppose is your point. Does that mean each individual comment is itself insightful? No. At best it's a misnomer.
And that's where we disagree because such an analysis has no guarantee of being accurate. You cite the social sciences where they use the method to create a hypothesis to be tested - how exactly are you going to test yours here?It's a very common means of analysis to gather multiple situations, each with seeming simple meaning, and combine them to gain a deeper understanding. The fact that we know the Giant shows horrific scenes in some cases, but chose not to do so here, gives us additional knowledge about how he creates.
We're just not going to agree on this, period. If you want to keep the quote for your own purposes, that's fine, but i don't think it needs to be indexed. Ironically, I think the quote Jasdoif mentions provides more insight than this one ever will.