Not correct.
Minnesota returns 2 of 5 starting offensive lineman -- both their right and left tackle.
Also, their projected starter at center started in Minnesota's bowl game.
The Gophers actually had to replace 4 starting offensive lineman from 2021 last season. And they did just fine.
That's credit to their very good offensive line coach, Brian Callahan. He's produced first and/or second team all-Big Ten offensive linemen in 4 of the past 5 years (Covid-shortened 2020 is the exception). Callahan is also their run game coordinator.
Athan Kaliakmanis played 42% of the snaps at QB last year for Minnesota -- so he's really not that green. And Tanner Morgan was quite average. Kaliakmanis, a 4-star recruit, has more upside than Morgan.
At RB, the starter will likely be a transfer from Western Michigan, who rushed for over 1,000 years each of the past two seasons. He chose Minnesota after initially picking Oklahoma State. Sean Tyler is also a very good receiving back and returner -- more explosive speed than the Gophers have had at that position.
I don't think your track record of talking down opponents has panned out in Nebraska's favor very often.