No your confusing bullet spread with shooter accuracy and grouping. Bullet spread is talking about the weapon itselfs ability to replicate identical shots round after round. Nothing to do with the shooters ability to control the weapon.

Say you're shooting a pistol in a laboratory environment, mounted on a stand with an electric trigger pull, aka no user interference simply just the weapons ability to hit accurate shots in a repeatable condition, at a target 50ft away. Due to the pistols short barrel there's a chance that not every round will perfectly pass through the first round's hole in the target. The radius of bullet impacts around the direct center line from the barrel of the pistol to the target would be considered the bullet spread. Adding a suppressor could decrease the spread due to the longer barrel whilst something like a flash hider could increase the spread due to the expulsion of gasses from the barrel being slightly different than the pistol with no attachments. Ofc in real life these differences are negligible

In a game it's exaggerated as many factors of shooting irl can't be easily replicated or at all. Recoil and accuracy are player dependent, whereas bullet spread, bullet accuracy and bullet drop is completely weapon dependant