That's such a naive take, the joy of helping the customer ha! That's a situation your employer sets up for you!
Try reading your sentence above and swapping in 'EMPLOYEE':
'These LLMs are like EMPLOYEES. The customer cannot tell the difference between EMPLOYEE painted and LLM generated at even a short distance. '
The customer can absolutely tell the difference between a Caterpillar digger and a dude in it vs 100 dudes with shovels