I don’t think the issue here is whether the IV can be flown safely.  It can.  Those of us on the forum are proof of such (full disclosure – I fly an ES-P).  The issue is how much margin of error the plane offers when the pilot makes a mistake.  Even the best of us make mistakes.  Whether those mistakes kill us or not is a function of how many we make in a row, how bad they are, and how much margin for error the plane gives us.  The first two are relatively independent of the plane you are flying.  The third is entirely dependent.  A plane like the IV, with very narrow margins of safety, will kill more pilots than a plane that has a much broader set of safety margins because pilots are human and make mistakes.

So, in my opinion, relative to most other planes, the Lancair is less safe.  Let’s stop pretending otherwise.  That is just part of the price we pay for high performance.  If you make a bad mistake, it is much more likely to kill you, which is why it has such a poor safety record.  This is not the plane’s fault.  Rather, it is because we as pilots can’t be perfect all of the time.