If Lesswrong would be good at brainwashing I would expect much more people to have signed up for cryonics.
What steps would one take to get more actionable information on this topic?
Spend time outside of Lesswrong and discuss with smart people. Don't rely on a single community to give you your map of the world.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.