I agree 100%. Doing a worse job IS an error. It should be treated as such. Or at the very least make that behavior opt-in. The default should not be pretending like nothing happened and just quietly doing a worse job.
Imagine your healthcare provider just sometimes decided not to read your test results very carefully and you risked death? Now realize that healthcare providers use Claude now and that scenario wasn't hypothetical.
Especially if your name has any machine learning terms in it.
Ah "Mr. Monty Carlo", it says here that you have a UTI, we'll get those kidneys removed ASAP so that won't happen again.