What Luis heard from the store was a preliminary estimate, not a final bill.
While Luis is certainly a master-level expert on repairs (of course he could easily find cherry picked examples that could fool a Genius), in my opinion he is a classic example of an Apple hater and comes to this with a strong bias and a highly self interested agenda which includes 1) promoting his repair business and 2) creating juicy “gotcha” clickbait for his YouTube channel.
Which is a fantastic chance btw... despite what I’ve said it’s a great channel for learning a lot about hardware repairs.