When adding code this way, one needs to look it over and read to fix bugs or things that are not quite correct; stats show experienced developers often are faster not using this approach because debugging existing code takes longer than writing it fresh.

The speed is not the issue.

What matters is sometimes subtle bugs are introduced that require several people to catch. If at all. These issues might be unique to the Llm.

Having large sections of generated code offers the possibility of hard to find problems.

Some codes are more sensitive to such issues.

The details of how the code was added, and what it does, may render this issue harmless or very much a problem to be avoided.

This is why it’s a flag and not a condemnation