I am only looking at engines that have no particular problems in design....The hypothesis is that cooler running high RPM engines last longer than hotter running engines, despite using thinner oils.
There is no question that the choice of ultra thin, very high quality oil is a winning "secret" in motorsports. As you note, maintaining oil temps in the ideal range (for the viscosity) provides adequate protection in many cases. We can, for example, run a well designed, turbocharged, high boost, 600HP 4cylinder road race engine on 0W-20 oils if we actively manage oil temps to about 180F. This ain't easy by the way

and requires a well designed dry sump system with active control and large heat exchangers.
However, the use of UOA results to determine engine wear is in error. Despite claims to the contrary, the only way to determine component wear rates is physical inspection with precise equipment and methodology. Or, run to failure...
Furthermore, wear rates do decrease as temps increase. (to a point about 300F), especially cylinder and rings. So the thought of "cold operation" to accommodate an uber thin oil may or many not be compatible depending on desired outcome.
Add in the fact that higher HTHS is correlated with lower cylinder and ring wear.
Without active modification of oil systems and engine management, followed by side by side testing and disassembly, I suspect we will never know whether you are preventing engine problems by using an ultra low viscosity oil in an ultra high performance engine. The up side is that it is difficult to tax these engines in normal street driving.