Stores invest millions in anti-theft security, in technical, logistical, and physical ways. All of those things cost money.
You are making a clear logical fallacy by acting like this proves shoplifting must actually significantly impact their bottom line. Further there is abundant evidence that corporations invest massive amounts of money into things that don’t actually help them economically. Don’t tell me you also believe the narrative that markets are magically always rational??
You don’t seem to be able to understand this isn’t about numbers, it is about narratives.