Anyone who says “you’ll never get me to believe X” is someone with a closed mind and not open to learning or growing.
Based on the evidence, I absolutely believe Frazier called that exact defense.
Both sides of the defense played it the exact same way. That indicates that either numerous players (on both sides) messed up in the same exact way (symmetrically messed up), or that was simply the play call.
Notice how BOTH db’s on each side of the field were lined up in the same exact spot? The yard marker? It was definitely what Frazier called.
Personally, I think Frazier was concerned about Mahomes throwing to the sideline - not the middle seem.