To clarify, the exhaustion doctrine allows the owner of the licensed work (ebook, etc) to access/display/use the work except as disallowed by the license.

This includes viewing it on a computer monitor. It's irrelevant that the computer monitor maker does not have a license to the work, since the viewer does.

In the case of the audiobook speech-to-text argument: the licensee has a license to the audiobook but not the prose version of the work, which is a legally distinct creation under many decades of international and domestic IP law.

So Amazon or the customer needs to have the license to the prose work for speech-to-text to be defensible, but neither do.