What he's saying is obviously right but it seems to me that it was the tech press and the marketing people in the industry, that started using the collective HT

What he's saying is obviously right but it seems to me that it was the tech press and the marketing people in the industry, that started using the collective HTML5 term for all the new things that have emerged on the Web recently. They're at fault too for making cruel simplifications that the mere mortals then absorbed.