Of course, you’re right, but there’s no harm in being more specific. Myself and others were initially confused as to wether it was a drawing or a render, and I had to check the comments to find out.

I think people are reacting to your attribution in the title. “Digital” is usually used to say something was drawn on a computer rather than modeled. My guess is that no one would have said anything if you had used something like “3D render”.