Good NBA front offices “hit” on a high percentage of their draft choices. The best NBA front offices also make smart, shrewd pick-ups later in the draft and work the margins to find valuable contributors.
Most proficient NBA general managers can turn an asset (draft pick, trade exception, etc.) into a needle-moving player. But only the top ones can find that type of player via less obvious means.
The Raptors added Fred VanVleet as an undrafted free agent. The Miami Heat picked up Duncan Robinson that same way. The Celtics front office snagged Daniel Theis as an undrafted free agent and he turned into their starting center this season.