I admit I'm in this boat. I get immense value from LLMs, easily 5x if not more, and the codebases I work in are large, mature and complex. But providing "receipts" as the kids call it these days would be a huge undertaking, with not a lot of upside. In fact, the downsides are considerable. Aside from the time investment, I have no interest in arguing with people about whether what I work on is just CRUD (it's not) or that the problems I work on are not novel (who cares, your product either provides value for your users or it does not).