Beyond that (since I don't want to encourage a return to the Miller/Moore '80s, by any means), if they're not publishing something, how do they know it's not popular?
Oh, and let's not forget the tiny detail that comics are not popular, full stop. None of them. They act like they have this lucrative demographic they're serving and can't bear to part with, rather than maybe a hundred thousand middle-aged men whose hobbies include, based on what I can gather from the Internet, NEVER BUYING ANOTHER COMIC AGAIN whenever someone changes a costume.
It's bigger than any audience I reach, but if I'm how you're setting your standards, your business is not doing well...
Politically, though, I wonder if they mean that political themes are unpopular with executives or screenwriters. It's common knowledge that studios don't want anything subtle, because it'll get lost in translation for the overseas markets. They want spectacle, basically, so if you're writing a comic in hopes of an adaptation, that might be the route you take instead.
I don't know. The entire industry seems so pointlessly insular and reactionary to everything. I feel like we're actually ahead of the curve looking at half-century-old comics...