This article doesn't cite any real literature or studies. It cites a "expert opinion" a "nutritionist" as its only source.

It doesn't even speak to DIAAS scores, or where the RDA g/kg intake comes from. It doesn't speak of how to measure protein deficiencies and the signs of it (sarcopenia for example).

It conflates being full with getting enough bioavailable protein. It doesn't even talk about crude protein vs essential amino acids.

Protein on food labels is measured by nitrogen content (crude protein). Humans can only use protein that has all the essential amino acids. Nitrogen is not a amino acid, so added protein is almost certainly not bioavailable protein, and unusable. Your daily protein requirements should be satisfied with a complete protein source like animal foods (or a high DIAAS scoring plant )

This is not necessarily true. If you eat a lot of processed foods, as is the case with most people in the US, then you will most likely be eating a majority of carbohydrates and sugar. Even processed meats contain more filler than actual meat. Real protein is not profitable unless it's added in, in some stripped down form.

The gym bros in our class once had to do a presentation on protein. They stopped drinking their protein shakes after that.