It depends what's included in the service.

Major luxury brands include the price of replacing worn parts in their basic service for most three-hand watches.

Zenith offers partial service on their chronos, but if it's worn, you're going to be paying for a full service.

Moat modern lubricants are going to go 5+years, but older watches or local watchmakers could be a different story.

Interestingly, new IWC as an example, have an 8-year warranty and don't recommend service until performance suffers. Water resistance tests excluded, of course.

Chronographs are an underrated complication,in terms of watchmaking. A proprietary chrono is so difficult to execute, when some watch brand executives were asked, most placed the chrono/split seconds right below the PC and MR, (and above the tourbillon) in terms of difficulty.

I get it. It's probably the same with any specific education. Imagine how annoying the general public must be to medical professionals, for example.

Colloquial terms evolve and we learn to accept different connotations in different contexts.

I don't see/feel the need to make the distinction, especially since it's how the industry uses the term, unless we are having a technical discussion where it matters.