It's more nuanced than either extreme. But regardless of the root cause, if you have engineers duplicating work left and right something has gone wrong. Their labor is not being used efficiently.

EDIT: LLM or not, this is still true. If you have LLMs pumping out tons of duplicate code you're wasting tokens, and probably more importantly wasting engineer hours reviewing duplicate code.

In some cases it might be a fair trade, in moderation. In general it's certainly wrong.

Oops, I think I actually replied to the wrong comment, lol.