Not only can I not draw, I usually find that I don’t need to.
I’m usually creating visualizations of mechanisms of some kind. So, I know the dimensions and scale of what I’m going to depict. I therefore construct an arrangement of geometric shapes of proper rough size and dimensions on a ground-plane with a checkerboard set to usually 5 square feet.
The result is always going to be an animation of 2-4 minutes’ length so the important thing for me is to quickly block out the action and determine possible camera setups. I can do these things in this way, and the lens settngs, rigs, moves and so-forth can actually be determined such that they can be linked-to. You can’t do these things with a hand drawing.
The human imagination is the most powerful tool that you’ve got at your disposal. If you can quickly set things up so that “the decision that now needs to be made” can be made, even though the machine is a cube and the gun is a cylinder, then … “the wet-ware between any two pairs of ears” can blow away a digital computer every time. A drawing can’t do that, but a cheap-yet-accurate previz can.
My main concern is to figure out how I want the entire piece to go … quickly. In particular, how much of what I could crank-out, do I actually need. Of everything that I could model in-detail, how much effort do I actually need to pour into it? (Hollywood never builds “the rest of” a western town: only the part that you could see. Before the set-builders go to work, they already know exactly what that will and won’t be.)
When you’re working with real-sized objects, real cameras, real moves … and the “preview” render capability … you can actually get very close to a “final cut” for what you want the movie to be, and to make a lot of decisions about it, before you do anything time-consuming or expensive.
So, really, I don’t miss my lack of drawing skills much. They wouldn’t do me much good if I had them.