I agree that a non-instrument qualified pilot (by that I mean IMC / IR) would be wise to do everything in their power to remain out of the cloud.
It may well be that IR'd / IMC pilots end up dead as well as DFC points out, but I suspect (and this is the crux) that they were not current.
It is also true to say that current IR'd pilots die in CFITs .....but this tends to be during the approach / departure phase rather than just spiraling out of the clouds. Either that or due to equipment failures (i.e. combination of events).
EA