Only two of these occurred in the last 30 years.Seven times in my life time Illinois has won two or more games in the NCAA tournament. Twice with Bruce Douglas at point guard, twice with Frank Williams at point guard, twice with Deron Williams and/or Dee Brown at point guard.
The other one had a defensive small forward playing out of position at point guard. That team also had several guys who could handle the ball, including a slick passing point guard that came off the bench.
Having an elite point guard is not required for post season success, but it helps.
What worked in the 1984 is a pretty poor blueprint for what's going to work in 2023.
I'll take an elite point guard of course, but it doesn't take more than looking at the rosters of the teams who have made deep tournament runs lately to see that it's not a requirement by any means.