And even then this rule is not perfect because of individual genetics, metabolism rates, activity level, percentage of lean mass, etc.
Americans (US citizens) really do eat a lot. What the hell
1. It’s proteins and fats, not just protein. The site specifically calls out avocado as an example.
2. It’s from meat and vegetable sources. Other commenters have mentioned that you get more protein from non-meat sources than you expect.
But here we have the problems with the numbers and why they should only be guidelines. Consumption of protein needs to increase as you get old (into the range we consider for athletes). And basing consumption on body weight is stupid, because telling an obese person they need to eat twice as much protein as a non-obese person is probably wrong.