So many fallacies here, imprecise, reaching arguments, attempts at creating moral panic, insistence that most people create poor quality garbage code, in start contrast to the poster, the difference between his bespoke excellence, and the dreck produced by the soulless masses is gracefully omitted.
First the core of the argument that 'Industrialization' produces low quality slop is not true - industrialization is about precisely controlled and repeatable processes. A table cut by a CNC router is likely dimensionally more accurate than one cut by hand, in fact many of the industrial processes and machines have trickled back into the toolboxes of master craftsmen, where they increased productivity and quality.
Second, from my experience of working at large enterprises, and smaller teams, the 80-20 rule definitely holds - there's always a core team of a handful of people who lay down the foundations, and design and architect most of the code, with the rest usually fixing bugs, or making bullet point features.
I'm not saying the people who fall into the 80% don't contribute, or somehow are lesser devs, but they're mostly not well-positioned in the org to make major contributions, and another invariable aspect is that as features are added and complexity grows, along with legacy code, the effort needed to make a change, or understand and fix a bug grows superlinearly, meaning the 'last 10%' often takes as much or more effort than what came before.
This is hardly an original observation, and in today's ever-ongoing iteration environment, what counts as the last 10% is hard to define, but most modern software development is highly incremental, often is focused on building unneeded features, or sidegrade redesigns.