Think about this from a slightly different angle.
Suppose you are making a "routine" traffic stop and your intuition radar goes off. Normally you simply unclip your holster strap and proceed. Now, without one in the chamber, you remove your gun from your holster, rack the slide and replace the gun or not as you choose. What kind of message does that give to the person watching you do this? That person may be only guilty of going 60 in a 45 zone and that's all. If you don't give them an immediate heart attack, they may just decide to peel out thinking that is their best chance of survival from this rogue cop coming up on them. Instant felon.
On the other hand, if your intuition was correct and you don't rack one in, you could be dead about 5 seconds later.