Smarting under an avalanche of bad reviews, “The Newsroom” creator Aaron Sorkin admitted yesterday, “I don’t know anything about cable news.”

His new HBO series was meant to show the news “romantically and idealistically,” he said on “CBS This Morning.”

The idealized news show on the series “is almost within our grasp, and that is what makes it aspirational,” he said.

But he said “news shows should be exempt from having to deliver ratings.”