FWIW, I don't believe CWs should be routine but instead should be exceptional. Routine political posts shouldn't have CWs, though politeness would suggest a hashtag.
The reason I have this opinion is for the sake of empowering end users.
We can control how our feeds look by filtering on hashtags, and we can even make that precise through filters based on combinations of hashtags.
But CWs are blunt, harder to filter effectively, and give some control over the feed to the author's idea of what we do and don't want to see.
Make sense?