This is the perfect example of how in this industry everyone uses the same words and terms, but also have different definitions for them.
Apparently some carriers intentionally use words and terms very loosely purely for marketing reasons.
Other words, like Broadband, are poorly defined in the public marketplace, but get very specifically defined in State legislatures by incumbent carriers as a very low-speed, copper-based service to protect the incumbent’s interests and, or as something that is “illegal” for certain entities, such as municipalities, to provide themselves.
Fiber is such a word. It has no single meaning, or definition when referenced in the context of a product, or service provided by a carrier. The word fiber could mean dark, lit, or managed and it says nothing of the age, type, count, access points, cost of the fiber, or if it is aerial, or underground. These are the critical details that make all of the difference.