To be honest, the code quality in most assets I encounter is so low that sometimes I even throw away the scripts and only use the meshes/textures/shaders/etc.

To be honest, the code quality in most assets I encounter is so low that sometimes I even throw away the scripts and only use the meshes/textures/shaders/etc. This is some kind of systemic market failure. The general population of the market itself is so low-information that it can't properly distinguish between good and bad. It's pretty much the same problem as non-technical people hiring technical people. It's non-technical people evaluating code.