Component conversation_view not available when executing view export_content() from the Plone CLI

I hae a snippet of code that is supposed to export (and it works with all exports other than content), but when I try it _with content export_, I get a zero-bytes JSON file. This snippet of code runs as an entry point of my `bin/client` program.

Does anyone know what the problem with the export is?

Code: https://gist.github.com/Rudd-O/f46154c80eb9937ec387e2b460ebbe8b

EDIT:

Ultimately the goal is to be able to command an export of everything via the Plone CLI (`bin/client -c export.py`), primarily for (but not limited to) migration automation and testing. All other exports work correctly using this code — only the content one does not.

Start by reproducing the content export with the linked gist through `bin/client -c export.py`, then compare it with the other exports that work. Trace the content-export entry point and the `conversation_view` lookup described in the issue. Done means the Plone CLI produces a non-empty JSON content export.

Written by the indexing model from the issue text.