I understand it’s sad, but having been there a lot, I have to say it’s to be expected.
The stalls are mostly filled with paraphernalia for tourists. You’ll find first edition French comics, old magazines from the 60s, some fancy hardcover books to gift.
It’s definitely not somewhere locals shop. It’s part of the local tourist experience.
What I’m getting at is that they’ve created a business dependency on a market that is currently dry, using goods that aren’t popular with the locals. They should definitely pivot to cater to a local audience.