The distinction is not pedantry. An IP core, a gateway or a tag is evaluated on specification and integrated into something else, and the buyer owns the outcome. A complete system is evaluated on whether it works at the site, in the environment, with the people who will operate it — and the outcome is shared.
That changes what has to be engineered. A gateway needs a datasheet; a dispenser on a mine needs a position on hazardous area classification, a defensible metering record, an operator interface usable in gloves and sunlight, and behaviour that is sensible on a day with no coverage.
It also changes the commercial shape. Component products are licensed or sold against a specification. Complete systems are usually engaged as a programme, because deployment, calibration, integration and field support are part of what is being bought rather than services attached afterwards.