i've seen that bucs defense close a running lane in an instant. that 8-yards run in td was no lock (not to mention, 8 yards was from the line of scrimmage. it would have been an 11 yard run). and if you ask me, trying to run it in - that would have been the hero crap. throwing a pass is his job. trying to run it in would have been him trying to do it all. and if he didn't make it, people would have been crucifying him for trying to be the hero. even worse, he might have been injured in the process. that's my take.
note that your "all-in" was all defense. they also added turner who turned out to be pretty good. but no offensive weapons. so they went all-in on defense, and the defense still sucked. the offense had to put up at least 30 points per game to just have a chance to win.