It doesn’t. It was never the point of his post. You can still believe that if you want. His reasoning for why he doesn’t is outlined there.
It comes down to whether or not you find processes that we have researched and documented time and time again to be compelling evidence, or you want to believe it is a practical joke (while reductive, it is pretty much that argument breaks down to being).
The concern was that it uses a “liquid metal” thermal interface, and that if the system overheated while vertical it could migrate away from the hot zones. This is a potential issue with thermal grizzly’s liquid metal product, requiring occasional maintenance. Apparently the ps5 doesn’t have that issue.