Unfortunately, most people are going to vote "No" to this poll. They're all wrong.
Are drawings essential to a creature? Yes. It shows the sad state of schooling, but most people feel the need to have something to look at rather than make something up in their heads. It's true. Not being able to draw is not an excuse for giving up, but pictures are still essential.
I mean, I can't post proper pictures because I have no scanner, but I still threw up a crappy Paint picture. Everyone can do that. Now we have the creature editor, it's even easier. You might even be able to get one of the artists on the forum to do a picture for you. Pictures aren't difficult, even if you can't draw. And they are essential. So to answer the question posed by the thread title, no. To answer the question posed by the poll, yes.