Does this metric apply to everything? If I can't sing better than Britney Spears, I can't criticize her singing? If I can't play basketball better than LeBron James, I can't criticize him, etc?
While I find it hilarious that Londa constantly comes in to threads about female celebrities to post about how average/ugly they are, she has that right. Regardless of her own attractiveness or lack thereof, it doesn't disqualify her from making bad posts.