It's easy to put it that way, from the accuser's standpoint. Oh, so the customers didn't steal anything after all - no harm no foul, right? Of course, all the employee had to do was walk back into the store and get on with her day. Oops.
Meanwhile the victims of her "mistake" were called out as thieves and berated in public, told they couldn't leave the store because the police were being called on them, were followed down the street when they walked away from the situation, detained by the police, arrested, handcuffed, and after finally being utterly exonerated had to be treated for cuts and bruises from the handcuffs. That's two lives seriously disrupted because somebody thought it was possible they'd walked out of the store with a completely imaginary item. Do you think for even one moment that if either of these women had accidentally, absent-mindedly dropped a garment into their shopping bag and walked out the door with it only for a police search to turn it up, that an "oh I honestly thought I had left that back in the dressing room, oops" would've gotten them off the hook?
That point, well made.