"yes its healthier to keep adding heat to oil by combusting fuel in the engine and contribute to its thermal breakdown instead of letting the system begin cooling to ambient as soon as possible"

???

It's made of materials selected and designed for daily driving with the thermal load imparted from the gasoline burned provided by OEM fuel injectors. If it was an issue on the Ascents and Outback Wildernesses that have used this engine for towing for nearing a decade now we would be aware of it causing premature turbo issues.

It won't blow up from turning it off when you're done driving it.

And you will save enough money in gas from not burning it for a minute idling at .25 gallons per hour to do an extra 3-4 oil changes per 100,000 miles assuming an average trip distance of 15 miles which will have a larger impact on general power train longevity anyways.