A different twist to a craigslist scam?

I still don't understand why people don't simply use the encrypted, temporary email provided by craigslist.

I don't want anyone having my personal email or phone number, even if it's a burner email.

CL has already provided a secure communication method that goes away when the ad is removed, and can be used at both parties convenience and to verify what information was exchanged.

That reply is 100% suspect. They don't mention the item by name (and even if they did - look for a copy and paste from your own ad), and they don't even know it's a listing for multiple items.