“bin/magento theme:uninstall frontend/Magento/luma” results in “dependent package(s): magento/product-community-edition”

Magneto 2.3.4 Community, attempting to uninstall the luma theme, but there is some kind of dependency:

[public_html]$ bin/magento theme:uninstall frontend/Magento/luma
Unable to uninstall. Please resolve the following issues:
frontend/Magento/luma has the following dependent package(s):

There are only three themes installed: blank, luma, and custom.

themes “custom” and “luma” both have “blank” as its parent.