In the old days cameras used to be super bulky and difficult to take anywhere or capture any kind of image. If you couldn't use a camera to capture an image the next best thing was to draw it.
Eventually, inventors created a camera that was easier to hold and more portable than its predecessors. Though it was still not very light it was easier for people to record things that happened in thier lives.
Now, there are all kinds of cameras available for people to use. From disposable cameras to expensive canon cameras that are used for professional photography.