Sure but also us older folks over 20 are allowed to buy alcohol and that always flashes the light. And sometimes they have to randomly check a thing you’ve scanned to make sure you aren’t scamming. And sometimes it double scans and, while you can remove the item, they still need to input their ID - they trust you to scan everything, but not to unscan it.
Like, sure, there are people who struggle, but I’m not sure the customer service light flashing is indicative of the issue.