I've worked at so many places in my career that "not understanding code" is not an excuse. It is a skill to be able to read and follow code and get up to speed quickly, even on shit codebases. But "AI" generated code makes that so much more difficult, and the "AI" isn't going to walk you through it, and neither will your new coworkers. We aren't in a race to the bottom with "AI", we're in a speedrun to the bottom, and I don't think it's going to end up going too well for whatever developers are left in a few years.