> OK, great. Now I have a few hundred lines of C++ I need to read through and completely understand to see why it's incorrect.

For a time, we can justify this kind of extra work by imagining that it is an upfront investment. I think that is what a lot of people are doing right now. It remains to be seen when AI-assisted labor is still a net positive after we stop giving it special grace as something that will pay off a lot later if we spend a lot of time on it now.