That’s one aspect but he tried kettle heated water too and steaming the water produced better results according to the video. So most likely the air in the steamed water is what produces the better taste and texture.

And about the audiophile analogy upthread…some people don’t have good taste buds and other people have very sensitive tastebuds. One should have a bit of humility and not be the equivalent of a color blind person declaring that red and green are actually the same color and you must be imagining the difference.