Error reporting / warnings are inconsistent and don't make sense

[jonludlam]

See e.g. #784 for some confusion caused.

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. The main purpose of this is to keep the issue tracker focused to what is actively being worked on, so that the amount and variety of open yet inactive issues does not overwhelm contributors.

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[mbarbin]

#784 (comment)

+1 about this. I think it would be a great user improvement to hide the warnings that are not actionable (internals) from the user, and especially these that print Warning: when in warn-error mode.