I liken it to contractors or overseas engineers. They don't really care about the long-term effects of their code.
I does the thing, adds some code, adds test that cover that code, and responds with "Done."
At a fully agentic "No looking at code" company, we now don't have a great understanding of that code, we don't know whether it's a good implementation or not, whether it fits our current patterns, is maintainable, or composable.
We're entirely in the dark, at the behest of an agent at this point - if we want to maintain velocity. (And I would love to know whether that velocity is real or just perceived). It feels like the code part is faster? But also feels like I have to spend a lot more time up front working through a problem to understand it. In the past, I gained that understanding WHILE I was working through the code. Who knows.