As we all know, there was no such thing as a messy, bloated codebase incomprehensible to humans before AI.
"A computer lets you make more mistakes faster than any other invention, with the possible exceptions of handguns and Tequila." — Mitch Ratcliffe
If you really believe otherwise I encourage you to go have a chat with any one of a number of FOSS maintainers to hear their experiences pre and post LLMs.
See also https://en.wikipedia.org/wiki/Order_of_the_Engineer
Lastly, their "solution" to the crapfest, I fear, will be society footing the bill for "more AI" to "fix it". 95% of people will just accept that software has to be shit, and we'll all pay for it, while quality will be shown the door for being more expensive.