He held the ball for 8 seconds and didn't leave the pocket to throw the ball away in a game where field position was important. It was dumb. Did you watch how Siemian was getting outside the tackles and throwing the ball away last week? That's what nearly all QBs do and while, to his credit, Jameis didn't force the throw, he did force the sack by hanging onto the ball too long. It's a reasonable criticism.
All of that said, Taysom wouldn't do it either. He'd run the ball without even trying to get to the third guy in his progression. That will expose him to injury and likely cost us a game because the game plan has to change more if he gets knocked out than it did when Jameis did.
Siemian, good or bad, should start. Book should be game day #2.