I think the issue at the core of the analogy is that factories, traditional factories, excel at making a ton of one thing (or small variations thereof). The big productivity gains came from highly reliable, repeatable processes that do not accommodate substantial variation. This rigidity of factory production is what drives the existence of artisan work: it can always easily distinguish itself from the mass product.

This does not seem true for AI writing software. It's neither reliable nor rigid.

What assembly lines and factories did for other manufacturing processes is to make it feasable for any person to be able to make those things. In the past only very skilled professionals were able to create such things, but mechanisation and breaking down manufacturing processes into small chunks made the same things be able to be achieved by low skilled workers.

IMO that is exactly what is happening here. Ai is making coding apps possible for the normal person. Yes they will need to be supervised and monitored, just like workers in a factory. But groups of normal low skilled workers will be able to create large pieces of software via ai, whic has only ever been possible by skilled teams of professinoals before.