Comment by ForgotMyPwOops

My Dad is on a similar diet for health reasons after a cardiovascular scare (not even nuts or avocados allowed), apparently the amount of oil and protein the average sedentary person needs can be obtained from vegetables we don't tradionally think as being good sources of them because you actually don't need much oil or protein to be healthy

Though if you're trying to build muscle/are more physically active you'd probably want more protein rich food sources