Dak also has never had a four INT game or a three for that matter. Or a pick six.
We could do this all day.
Dak has played all of thirteen NFL games for cripes sake. If he is fortunate enough to play for as long as Romo has - Dak will have had several pick-sixes and many multiple-interception games. Even the all-time greats haven't been immune to very very bad days.
Romo has a profound understanding of the position he plays - but his physical body has of-late failed him. There are MANY areas where Romo is obviously light-years ahead of Prescott. Conversely, there are some talents exhibited by Dak that Tony really never possessed.
But the driving issue with Romo, the problem that precludes any meaningful competition between the two players, is the same one that claims all of the best in sports. The concern of the team staff is that Romo's body can no longer deliver on the intentions his mind has for it - and that he will only regress further from here. The success of the team despite Romo's absence (unlike last season) is why they have made the decision to move forward with the 'Prescott Project'. Dak has reduced the opportunity cost of a transition by virtue of his play. Dak is NOT a better QB than Romo by any reasonable stretch. But the team has apparently decided that the margin in play between the two doesn't eclipse the day-to-day physical health uncertainties and the short-term prospects that come with Tony Romo. And, then you factor in the payroll hit that Romo represents... Yep! It's a real no-brainer.
