The store managers can’t compare how much inventory they ordered with got much of it was sold?

If you're really worried about this kind of thing, would you not take precautions to protect against it?

Because shopping for things behind plexiglass is such a major hassle that people won't bother purchasing at all?

Time never moves slower than waiting for an indeterminate time, possibly forever, for someone to come to open the plexiglass for you, especially as you're not even sure the button you pressed to call for help even worked.

The retracted statistics weren't about the total amount stolen. They were about the percentage stolen by organized retail theft rings.

It still makes sense to lock up your inventory if you're seeing a high rate of theft, regardless of whether it's organized crime or not.

Store Managers at retail chains are not buying locked cabinets for their stores. That decision is being made for them.