I think you should not turn things around here. Up to 2021 we had a vibrant software environment that obviously had zero "AI" input. It has made companies and some developers filthy rich.
Since "AI" became a religion, it is used as an excuse for layoffs while no serious software is written by "AI". The "AI" people are making the claims. Since they invading a functioning software environment, it is their responsibility to back up their claims.
Still wonder what your definition of "serious software" is. I kinda concur - I consider most of the webshit to be not serious, but then, this is where software industry makes bulk of its profits, and that space is absolutely being eaten by agentic coding, right now, today.
So if we s/serious/money-making/, you are wrong - or at least about to be proven, as these things enter prod and are talked about.
How do you know?
As you haven't evidenced your claim, you could start by providing explicit examples of what is significant.
Even if you are correct, the amount of llm-assisted code is increasing all the time, and we are still only a couple of years in - give it time.
Why not ask the actual experts
Many would regard Karpathy in the expert category I think?