Well I don't like the dragon parable either. It's overlong, a bit condescending and ignores the core problem that anti-aging research has done a pretty poor job of showing concrete achievements, even if it's right that it's under-prioritized. I was not a fan of yours exactly because I think the parable elides the most important parts of the actual topic. Even if a direct discussion would be flamey, it's not better to discuss a poor proxy. I'm not trying to pick on you, I just think you tried to define the problem with some premises that were well worth dispute.
There are all sorts of other bad analogies out there though: "If canada launched missiles at the US, how would it respond?", even though the US hasn't turned Canada into a prison-state over the course of 50 years, is one on the news a lot right now.
Parables about the danger of nuclear weapons that ignore the fact that this danger was successfully handled (there was something on here using it as an analogy for AI).
Also, when parables are kind-of-but-not-really trying to be coy about what they're actually about is a bit annoying, leading to stilted writing (but that's the least of my issues).
EY also has a lot of dubious parables, but tackling those is a subject for a bigger post.
And of course there's the whole genre of parables where two fictional interlocutors are arguing, the strawman 'loses' the argument, and that's supposed to convince us of something. I think LW manages to avoid overt versions of this.
In the realm of politics (both Red/Blue and further-from-mainstream) people often apply "argument by utopia", which suffers similar issues in that it attempts to prematurely define convenient facts and use a narrative to elide gritty, worthwhile details of an issue.
I feel like the dragon parable correctly shows, if anything, negative progress being made towards dealing with the dragon, until suddenly, it is dealt with. I suppose one difference is that the anti-dragon projectile seems so much more achievable and imaginable than a cure for aging.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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