SP didn't have to start with a rookie QB. He was able to find a QB to run his offense, a castoff from SD who moved on to their shiny new QB. SP needed DB for his offense.
Fast forward to 2025, the game has changed and Moore is the modern offense OC. Fields was cast aside for a new shiny QB by Chicago. Moore looks to favor mobile QBs over drop back guys. He's still really young and Moore can build an offense around him.
Starting a rebuild without having to spend draft capital on a QB gives the rebuild an instant head start.