Comics are not illustration, any more than fiction is copywriting. Illustration is essentially the application of artistic technique or style to suit a commercial or ancillary purpose; not that cartooning can't be this (see any restaurant giveaway comic book or superhero media property as an example), but comics written and produced by a cartoonist sitting alone by him- or herself are not illustrations. They don't illustrate anything at all, they literally tell a story.

My head looks like an uncooked ham with glasses.

No one blames themselves if they don't understand a cartoon, as they might with a painting or "real" art; they simply think it's a bad cartoon.

Unlike prose writing, the strange process of writing with pictures encourages associations and recollections to accumulate literally in front of your eyes; people, places, and events appear out of nowhere. Doors open into rooms remembered from childhood, faces form into dead relatives, and distant loves appear, almost magically, on the page- all deceptively manageable, visceral, the combinations sometimes even revelatory.

One of the things that appealed to me most about comics was that you can pick the ones you like and build your own personal pantheon.

I don't think that people are necessarily going to films simply because they were adapted from comics, though I could be wrong. Comics aren't really misunderstood either, they've just been mostly silly for the past century, and those genre-centered stories have found their way into the movie theaters over the past couple of decades because a generation who grew up reading them has, well, grown up.

The thing I don't understand is why so often one hears discussion of the fruits of human labor as if it's all the creation of some alien race.