The assumption is obviously- if you can beat Playoff Teams at a 50% rate, you can surely win, at least one Playoff game yourselves. If you can only do that between 10-20%, you’re obviously far, far, far from Prime Time and Playoff Ws! And, it is highly unlikely there has been a signature W, against a star studded, healthy opponent.
Like the Bills have been this entire generation, including under McClapper!