You have a good point there. The problem is that LaTeX doesn't have a fundamental distinction between 'style' and 'commands'. Everything is really just a comman

You have a good point there. The problem is that LaTeX doesn't have a fundamental distinction between 'style' and 'commands'. Everything is really just a command, but by convention some of them are wrappers around predefined styles, like \section and \chapter for example. If you want to change the style of these yourself then you have to dive into the internals of LaTeX where things get messy.