In my experience, it's just about cost-effectiveness. Proper visualization is hard, researchers have a lot of ground to cover and theory and proper experiments

In my experience, it's just about cost-effectiveness. Proper visualization is hard, researchers have a lot of ground to cover and theory and proper experiments are just more important (not only for journal reviewers). Sure, if have a big research group with man hours to spare someone should focus on that, but it's rare to have that capacity.