Dansby Swanson was arguably the best defensive SS in the game. He was the 6th best in fWAR over the span of the previous 2 seasons with only 1 SS being more than 1 WAR better. 3 of the SS's ahead of him were Trea Turner, Carlos Correa, and Xander Bogaerts. Outside of that FA and a rumored offer to Ohtani, the Cubs haven't been linked to QO FAs.
There's also a handful of SP in this FA that was in the same tier of pitcher that Max Fried is and won't be offered a QO for varying reasons like Yusei Kikuchi, Nathan Eovaldi, and Jack Flaherty. Then you have guys that are better coming off TJS like Shane Bieber who happened to pitch for our lovely small market GMs team.
Dansby Swanson was one of the best SS's in baseball. The Cubs already have 2 Max Fried's.