If you, the development engineer, haven't demonstrated the product to work as expected, and preferably this testing is independently confirmed by a product test group, then you can't claim to be delivering a functional product.
I would add though, that management, specifically marketing management setting unreasonable demands and deadlines, are a bigger threat to testing than LLMs.
Of course the damage done by LLM generated code not being tested, is additive to the damage management is doing.
So this isn't any kind of apologism, the two sources are both making the problem worse.
You and me both, and for many of the same reasons.
I would point out that in your OPs comment, Luddites get the stereotypical dismissal as anti-tech, which is far far from the reality of demanding good conditions for workers.
For the modern s/w engineer, being granted the time and resources for adequate testing could be considered a "worker's rights" issue. In that context the Luddite allegation could be accurate.
My comment is largely along the same lines:
https://news.ycombinator.com/item?id=46313297#46319510