This is why artists tend to be paid more per page than writers. It’s not that their work is more important. It’s that it takes much less time to write “Our protagonists enters a modern classroom filled with about 30 10th-graders of varying ethnicity” than it does to draw it.
Also, this is why its important to be able to draw *anything.* Learn to draw from life. Be quick to seek out photo reference when you need it. Even if you want to draw Superman, you’re going to have to draw Clark Kent once in a while.