We can (and at the time, did) mock Lemoine for his reasoning; nevertheless, he was willing to violate an NDA on the basis of what we would now call AI psychosis.
We are sill getting people resigning to talk about the risks as they see them. It would be great if, four years from now, we look back on them the same way we look back on Lemoine; but we can reasonably forecast that more staff will continue to say these things, especially as the public statements from several of the CEOs is compatible with "this has the potential to go very wrong, we should do something about that".
You may think the CEOs are lying*; but I think leaks from employees are what matters here, and regardless of if those statements are lies or not, they are statements which may increase such leaks.
* I mean, Musk did say "With AI we are summoning the demon"; given he now talks of a robot army and factories on the moon pumping out orders of magnitude more compute than humanity's current aggregate power use, either he's a liar or he's Faust. Or both.