As far as I know, our track record of deliberately driving species extinct that are flourishing under human conditions is pretty bad. The main way in which we drive species extinct is by changing natural habitat to fit our uses. Species that are able to flourish under these new circumstances are not controllable.
In that sense, I guess the questions becomes what happens, when humans are not the primary drivers of ecosystem change?
Funny enough I have been to lesswrong events and felt like the author and probably looked like the random people the author describes to others.
When I join these events I always feel like I am missing a ton of context and interaction with the concepts discussed.