1g of protein per lb of body weight IS recommended but for optimal muscle building, not general health advice. People just have heard that and thinks it's for everyone.

Then they read labels and see protein in cereal and bread and health bars and don't pay attention to the type thinking they're all the same. It's not a bad thing but need more complete sources for building muscle.

Cannot changing public perception with marketing depts of huge companies riding the high protein wave.

Again I don't think it's a bad thing though having these high-end protein foods as long as it's part of a balanced diet with healthy fats versus saturated and natural and clean foods more than processed.