Any description is a simplified, limited description of real phenomena, the analysis is about a model of nature, not about nature itself with all its complexity. This is not a problem if the assumptions and limitations of the description are clearly stated. The same situation may be described on different levels, but all of them can be correct if the conditions are stated clearly. This is very important, the simpler description prepares for the next level. It does not become obsolete either, simple problems should be approached with simple tools.
Simplicity promotes understanding.
Drawing is more powerful than text and equations when it comes to truly understanding difficult concepts or situations. One can easily write a long paragraph without much meaning. It is much more difficult to draw a sketch of the situation without actually understanding it. Therefore, sketches and graphs must be part of the language of any physics teaching.