For instance I see this a lot in DRY code.
DRY is one of the most misunderstood practices. If you read pragmatic programmer (where DRY was coined), they make it clear that DRY doesn’t mean “avoid all repetition at all cost”. Just because two pieces of code look identical doesn’t necessarily mean they are the same. If they can grow independently of each other, then they’re not repetitions according to DRY and should be left alone.