What became incredibly obvious to me, after working in software and then as a mechanical engineer, was that software has absolutely no engineering culture.

Software has a deeply ingrained craftsman culture, which empathized personal flavor, unique approaches, stylistic debates over engineering. Surprisingly this gets worse in large organizations, where adherence to stylistic choices, specific tools and workflows, supersedes engineering at every point. Software is still full of fads, where every couple of year a new or old flavor is found, which is now the "right" thing to do, which will then be defended and attacked until a new fad is found.