Better is in the eye of the beholder. But I don’t think any medium should be rejected.So you don't think that certain topics are better served by different mediums. Which isn't to be confounded with excluding a medium but just acknowledging that one may be ideal while the other isn't?
As @Grinner said, political cartoons have always been an effective and popular form of satire / protest / propaganda. That’s why we always teach about them.