You keep saying KC's line was "far better" than SF, which is frankly a crazy take. Their Ts were a major issue all year. While no one apart from Williams is a special player for SF, the rest fit their system. Both lines were really slightly above average. Thinking wither team had any noticeable advantage is silly. If anything Thuney going down might it to the 49ers for last night.
Also, we saw SF rebound defensively from a shaky month. They were the better D last night, if not by a ton. They are both top-notch defenses.
The biggest advantage either team had (aside from QB) was the crazy disparity in offensive weapons.
Yeah, KC's secondary was a good deal better, but then SF had big advantages at LB and DLine.