The fiber optic cable, by itself , is great if it is part of a land line system. Corning demonstrated decades ago that fiber optic transmission can transmit all the generations of electronic signals that the western world has yet to think up. The glass cable emits nothing so is as safe as copper wire, or better.
The problem comes with wireless. If, for example, a building has a glass harness but has a 5G transmitter/receiver on the roof then there is still a radiation problem. I have seen locally, thru public hearings,ATT reps lieing thru their teeth about building 5G towers too close to schools. They simply won’t talk about radiation levels.
yea wireless is the problem not cable