Mostly ego.
They thought they could just go with a bunch of guys they recruited out of HS to supplement for the players they lost to the NFL & didn't invest in any veteran OL's from the Portal.
Because of the Portal, most teams around the country have good pass rushers, even if their overall Defense is bad, they will still have a few DL's who can get after the QB. So, what's happened is even though the Offense is dominating because of Mensah & Toney, we still will give up a few sacks here & there because the OL as a collective unit struggles with Speed rushers.
They anticipated for multiple TF's to be ready to play, specifically at the Tackle spots & none of them were ready at all.
Then Mirabal has forced this SJ experiment because they really like his toughness, despite his physical limitations.
But the fact we still have such a juggernaut of an Offense inspite of the fact there's some holes in the protection schemes, just highlights how good our OC+QB+WR trio is.
I don’t think it will be a mitigating issue that prevents us from winning the Natty. But it definitely needs to be addressed this offseason. It would be wise to go get some OL's out the Portal this January, if not for anything more than just insurance depth.