Teams behind throw more, so yes QBs racking up lots of completions tend to be on losing efforts. But you commit the fallacy “just run 25 times” when you take that to mean completing passes doesn’t lead to victory. It’s not necessarily the raw number of completions, it’s the percentage. Tebow completes less than 50% of his passes. That’s bad. Period.
You commit the fallacy of confusing the mechanism with the result. What matters is consistent progress...sustaining drives and punching it in the end zone. A 5 yard run is certainly as good as a 5 yard completion.
Consistent rushing also keeps scoring down, as time runs off the clock much more consistently. Keeping drives going additionally gives the defense a chance to rest.
The rules changes have made it generally easier to score by passing...but if a team can rush consistently, they can control a game and win. it also makes it a lot easier on the defense...short games, and lots of rest between drives generally yield lower scores. ...but Time of Possession advantages, and low number of drives in the game are not the goals and do not cause wins - but rather they merely give insight to how the wins occurred.
This argument is like that of 3rd down conversion rates. Typically teams that give up high conversion rates are poor teams...however, there are teams that give up short stuff through the middle of the field and tighten up near and in the red zone, and give up relatively few actual points. These teams also tend to get a lot of turnovers. This forcing of teams to run a lot of plays gives them a lot of chances to make a mistake and often leads to turnovers.
Is that a bad defense if it doesn’t give up a lot of points? or is it merely a different means to success?
Likewise, if Tebow is running for 5.7 yards a carry, and putting it in the end zone consistently, and opening up running lanes for the RB, then that compensates well for a lot of not passing.
A QBs job is to keep the offense going until it scores, while helping out the Defense by not putting them in a bad position. The stress a running QB puts on a defense can make it struggle mightily...something Aaron Rogers uses to great effect.
As I recall, Tebow had some games where he was ripped by the Patriots, losing his only two lost fumbles of the year. Likewise, 3 of his 6 interceptions were in one game against the Bills. So 18 TDs vs. 8 TOs, in 11 games, might not be top 5, but it’s certainly out of the bottom 10 in any given year.