One of the advantages of using optical fiber in the backbone installation is:

Fiber optic cabling and its associated transceivers and connectors are significantly more expensive than equivalent copper infrastructure.

Because fiber optic cables carry light signals rather than electrical current, they are not susceptible to electromagnetic or radio frequency interference from motors, fluorescent lighting, or adjacent copper runs. This immunity makes fiber the preferred backbone medium in electrically noisy environments and is a core advantage over copper.

Fiber installation carries its own hazards such as glass fiber shards and laser safety concerns, and is not considered inherently safer than copper installation.

Fiber termination and splicing require specialized tools and higher skill levels than standard copper cabling, not less.

Manufacturer support levels for fiber are comparable to copper and are not a distinguishing advantage of the medium itself.