This plays out every week. Perhaps not the exact time frame but same scenario. Coach A is content with killing the clock while Coach B forces him to either convert or punt. Big play ensues & now Coach A decides to go for points. There's nothing idiotic about changing your mind. His initial call was wrong (IMO) but adapting to what transpired is just part of the game.
You are wrong, as I just pointed out on a separate post.
Reid did NOT force Shanahan to "convert or punt".
Shanahan screwed up the clock. KC did NOT call timeout after the first down run. SF was on the 20 with 59 seconds. They ran for 3 yards AND KC DID NOT CALL A TIMEOUT. If Shanahan wanted to run out the clock, he would have instructed the offense to snap the ball around the 10 second mark. Instead, he sent in another running play and let the ball be snapped at 26 seconds.
THEN AND ONLY THEN DID REID FORCE A "CONVERT OR PUNT" SITUATION WITH A TIMEOUT.
That's what you are ignoring. Reid was ALSO content to let the half expire UNTIL Shanahan forced the issue with 2 quick and unsuccesful runs.
That's what you don't get. Reid took a timeout with 20 seconds left to give Mahomes MAYBE one chance to throw a Hail Mary.
Meanwhile, Shanahan changed his mind 2 or 3 times and then got surprised by a bit of success (on third down AND on the nearly-complete 42 yarder to Kittle, and that was not a horrendous PI play, so if the ref doesn't throw that flag, you've got SF scrambling around with 6 seconds left and only time for one play, which is either to attempt a pass or kick a FG.
STUPID.
If Shanahan had bigger balls, then he has more time to go for a TD (assuming Kittle is not flagged for PI) or else he has more time for Jimmy to throw deep (since the PI happened on first down).
Stupid, stupid, stupid clock management by Shanahan. In a big-game situation, he kept changing his mind, he wanted it both ways. He wanted to "burn clock" and he wanted to "take a couple of shots".
Pick one and stick to it. He didn't change his mind after the 3rd down 20-yard completion, he changed his mind after the 1st down run for 3 yards, when he called a second run instead of letting the clock wind down.
Stupid.