I'm aware of what SLU does offensively, and I can understand why you would think that type of team will give Nebraska fits.
But you're forgetting about the demise of the Atlantic 10 Conference. Over the last 7 seasons, the A10 is only 1-10 vs. high major opponents in the NCAA tourney. They really haven't had any prolonged success since Dan Hurley was at Rhode Island, clear back in the 2017 and 2018 NCAA tournaments.
The league also hasn't beaten a single team slotted higher than a 5 seed since Jim Larranaga and Shaka Smart were coaching nearly 15 years ago.
As for the Texas A&M comparison, the Aggies kicked Nebraska's ass because they were a dominant rebounding team. THey pulled down 19 defensive rebounds and had 3 times as many 2nd chance points as the Huskers. Yes, they shot the 3 pointer well, but they were far too athletic in the paint for the Huskers which led to a lot more possessions, while Nebraska was basically one shot and done on nearly every trip down the floor.
SLU is a very good rebounding team. But they're dominating in a weak conference. They wouldn't be putting up those big numbers in the Big Ten. On the flipside, A&M was absolutely one of the top rebounding teams in the SEC, which was the best league the country that year.