It's my impression that the WebGPU spec design team went to extreme lengths to accommodate Apple's wishes, and Apple in turn does not even support WebGPU in Safari. Why not express vitriol? Apple does not seem to act in good faith.
Because getting angry about things that are false is insane.
WebGPU is still in progress in Safari - it is available as a technology preview. The same is true for Firefox.
WebGPU works just fine in Safari on my iPhone. It was enabled by default starting with iOS 18.2.