I couldn't agree more with the sentiment.

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.