Yes, this is a common confusing point between structured logging and wide event. The Wide Event 101 article I referenced has clear explanation:

> Structured logs could be wide events, but not all structured logs are wide events. A structured log with 5 fields is not a wide event. A structured log with no context is not a wide event.

And these also why it requires no code changes to extract more metrics from wide event. The context can carry enough information and you just write a new query to retrieve it. In current metrics tooling, you will make code change to define new labels or add new metrics for that.