I think you’re missing the original point. It was nothing about unions or free association. In fact, the point was that ALL systems become incoherent as they scale.

The existence of unions and free association is built-in to the argument that systems designed to pick up trash sometimes intentionally do not pick up trash.

It’s not a moral judgment that these systems are broken and therefore workers should be slaves. It is an acknowledgment that complex systems end up having to meet conflicting priorities and therefore become, as you say, incoherent.