If you want to test the theory that there is no such thing of shock cooling, do it in your own aircraft.
I have, over many hundreds of hours.
I doubt many owners will approve of your engine handling practices.
Presumably, then, those owners never fly into rain?
If there is no such thing as shock cooling, then why is it that all the Continental piston engined jump ships that I know, never make TBO without pulling a cylinder?
You're mixing up causation and correlation. I know plenty of people who operate big Contis in 'ordinary' operations who've had cylinders replaced before TBO.
The build quality of TCM cylinders these days is sh*t. They've forgotten how to do it properly.
That's why I bailed out of TCM into Lycoming.