To play devil's advocate, I think what was suggested is that for the artists who do this kind of work, the eschewing of using a computer IS what makes this, if

To play devil's advocate, I think what was suggested is that for the artists who do this kind of work, the eschewing of using a computer IS what makes this, if not superior, at least their preferred method of working. For at least some artists doing this work, the whole point is that everything you see is drawn by hand because they want to do that work, not for lack of a better tweening algorithm, machine learned or otherwise.