None of those links actually cite a disadvantage. In fact from the second: "Finally, the authors reiterate that even if you consume “unnecessarily high protein

None of those links actually cite a disadvantage. In fact from the second: "Finally, the authors reiterate that even if you consume “unnecessarily high protein intakes” like 1.3 grams per pound of body weight per day, this still isn’t a risk to your kidneys unless you already had kidney disease."