Every food commercial, advertisement, and packaging in the US is currently protein obsessed. I just bought 3 burritos, and the most noticeable thing on the entire package is its protein content. TV commercials about waffles are advertising that they have X amount of protein per serving. The products in my jobsite's vending machine have protein all over every package.
Its not because of obsession, it's because it's literally the starting point for nutrition knowledge, and it's the most obvious thing that would be lacking in a vegan diet. When people think substantial protein they think meat first and dairy and eggs second.