Hmm: in the UK (I guess you are not) the cable provider - for whom I worked for many years - has used the term "fibre" for a long time.
Amusingly, when ADSL was young, they advertised that their product was better than the competition's "copper". BT complained. They lost because <cable provider> pointed out that the coax cable was steel sheathed, so not "copper".
As evidenced recently by Boeing, when marketing enters engineering, truth and performance leave immediately.