While comic book sales have plummeted in the last couple of decades, politics are not entirely at fault. All print media is hurting financially, comics are no exception. Limiting the amount of politics in comic books may bring back some of the readership, but it won't make a significant difference to the comic book publisher's profits. Further, comic book fans can still connect over their love of the characters and stories even if politics are present. They just have to ignore the politics.
Wertham's book, "Seduction of the Innocent" has since been questioned by scholars who have debated the accuracy of the evidence presented.