It's parsimonious of me, but "hacker" includes the idea of "pushing hardware into uses not intended by the manufacturer."
This is an API that's being straight-up handed to you by the manufacturer, a manufacturer that historically has had a challenged relationship with the various hacker communities that have formed around their products.
Do you really think this was originally a planned feature by Tesla? That some cynical marketing manager sat down ans though "if we do this we'll get X impressions leading to Y new sales, lets allocate 0.7FTE engineers to the task"?
I very much doubt the design requirement for the Model X include a specification for "muat be able to produce Christmas shows". This sure looks like some engineer had a spurt of creativity, which qualifies to "hacking" to me.
This is an API that's being straight-up handed to you by the manufacturer, a manufacturer that historically has had a challenged relationship with the various hacker communities that have formed around their products.