Not sure what you're pointing out. We won TWO natties in this time frame. The first was in 2017 when Tua replaced Hurts off the bench in the second half. The second was in 2020 with Mac Jones. When we had Tua, Mac Jones, and Bryce Young our stats showed a reliance far more on the pass than run... as they should have given the talent at QB and WR. I don't think they "under-utilized" the RB's so much as they played to their strengths in those years. The main point I and a few others are making is that if you think "you HAVE to run to gain at least 40-50% of your yardage to win", that's a false narrative. Both LSU and UA demonstrated it to be false.
I think a better narrative would be "you need to be able to control the clock to win"... which in the past equated to "you have to run" but in CKD's offense is accomplished through the passing game as well.
I'm pointing out that isn't the recipe for success. I also reviewed other championship teams over the past 20 years and with rare exception a strong running game was part of a championship game. I think you are conflating two things a bit. You said "
you have to gain at least 40-50% of your yardage", that is not the point I am making (though I do agree controlling the clock is one important benefit).
That's not it at all. What I'm saying you need a certain percentage of your plays to actually be hand-offs to keep your offense balanced and not overly rely on the QB (you mentioned LSU, and they are an abberation but they were still a top 60 rushing team). Maintaining a balanced offense has a ton of advantages. And for the record overly relying on QB play doesn't mean you're not running the ball either, with Hurts the problem was they didn't pass enough for instance.That team had 597 rush attempts (154 from Hurts) and 333 pass attempts (including Tua's 77). That's not balanced either and it ultimately required a QB swap in the championship game as I alluded to.
But, overly relying on QBs in general was not the path to success. Mac is literally the only exception and I covered that as well, Heisman candidate at running back. So, to review, two years as Hurts starter, had to be benched in the championship game. Two years of Tua as starter, actually also got benched in the championship game. Two years of Bryce as a starter, also no championships (receivers got hurt, there was no offense left to speak of). Yes, over-reliance on the pass in two of those cases, over-reliance on the QB in all of those cases and the only time it actually worked was an aberration (you don't usually have three Heisman trophy candidates or bench a QB in a championship game and still win).
It actually should be expanded though, because we didn't just have two years of Hurts, Tua, and Young, there were two years of Milroe. Not one of those guys won as a starter! In almost every single case, the QB was overly relied upon, so much so that there were only 4 thousand yard rushers in ten years after having 8 in the previous 9 years (including a 2,000 yard rusher). About the 4 thousand yard rushers in 10 years things, it's not playing to your strengths when you have Jacobs, Gibbs and Haynes and none ever hit 1,000 yards. Literally two of the best rushers in the NFL and one of the best in college football.
If we narrow that down a bit more we have a span of 4 championships over 7 years, which include 6 thousand yard rushers. Followed by a span of 4 thousand yard rushers in 10 years and 2 championships. That's my point, one was the far better recipe for success. It isn't necessarily running for a certain number of yards though, it's simply making sure the offense is balanced and not overly reliant on QB play.
Edit: To put this into context, let''s look at Milroe last year (numbers might not be perfect, not sure I weeded out all the backups but it speaks to the offense in general):
42% of the plays were pass attempts
36% of the plays were hand offs
21% were quarterback runs.
To put that into how I view things, he shouldn't have been responsible for over 60% of the offensive plays, and hand offs should have been at least 40% of the offensive plays (neither hand offs nor pass should dip below 40% in my opinion). In this scenario, Haynes getting those hand offs at his season average would have resulted in more yards and it also would have balanced the offense and created less situations where Milroe was clearly trying to do too much.