Cross examination will show him to be largely unschooled on firearms. You don’t have a “gun in the chamber” and the Keltec 9mm doesn’t have a safety.
Besides, carrying with a round chambered is the good practice for precisely this scenario: having to draw the gun and not having the other hand free to rack it. The TM fans are saying having a round chambered going into the confrontation shows premeditation. They watch too much TV when all the actors rack their weapons after drawing them from their holsters. For dramatic effect.