Social reality and culture work a lot like improv comedy. We often don't know "who we are" or what's going on socially, but everyone unconsciously tries to establish expectations of one another. Understanding this dynamic can give you more freedom to change your role in social interactions.
tl;dr: that raised some interesting points. I'm not sure "actionable" is the right lens but something nearby resonated.
My current take is something like "yes, LessWrong is pretty oriented towards propositional knowledge". Not necessarily because it's the best or only way, as Romeo said, because it's a thing that can scale in a particular way and so is useful to build around.
Your point that "fake frameworks that are actionable are seen as preliminary, but there doesn't seem to be a corresponding sense that compelling-but-inactionable-models are also 'preliminary'" was interesting. I hadn't quite thought through that lens before.
Thinking through that lens a bit now, what I'd guess is that "actually, yes, non-actionable-things are also sort of preliminary." (I think part of the point of the LW Review was to check 'okay, has anyone actually used these ideas in a way that either connected directly with reality, or showed some signs of eventually connecting.' A concept I kept pointing at during the Review process was "which ideas were true, and also useful?")
But, I think there is still some kind of tradeoff being made here, that isn't quite about actionability vs vetted-explicit-knowledge. The tradeoff is in instead some vaguer axis of "the sort of stuff I imagine Val is excited about", that has more to do with... like, in an environment that's explicitly oriented towards bridging gaps between explicit and tacit knowledge, with tacit knowledge treated as something that should eventually get type-checked into explicit knowledge and vetted if possible, some frames are going to have an easier time being talked about.
So, I do think there are going to be some domains that LessWrong is weaker at, and that's okay. I don't think actionability is the thing though.
Some of this is just about tacit or experiential knowledge just being real-damn-hard-to-convey in writing. A lot of the point of the original sequences was to convey tacit knowledge about how-to-think. A lot of the currently-hard-to-talk-about-explicitly-stuff is stuff that's real important to figure out how to convey and write up nuanced sequences about. (I do think it's necessary to figure out how to convey it in writing, as much as possible, because there are serious limits to in-person-workshop scalability)