No. Their win% is about the same.
I think you could argue, successfully, that the Saints are a 0-16 caliber team without Brees. He's good for +7 wins. The Chiefs, without Smith, are probably closer in that 6-7 win category. He's +5. The Bills without TT are also probably in that 6-7 win category. He's +2.
Teams matter and I've never intimated otherwise. TT with the 2014 defense probably sneaks into the playoffs given enough chances.
But if you don't think that win% matters more based on the QB than anybody else, I don't know what to say.
Romo had a 4Q comeback and GWD last time he was in the playoffs.