Fiberglass ladders are lower conductors of electricity and do not succumb to the elements. They are a good choice for people who use them often either at home or on the job. Even though fiberglass ladders are more expensive, they will last a lot longer than other types of ladders
Fiberglass ladders are way safer than aluminum ladders because they are electrically resistive and heat tolerant. They don't bend when exposed to heat and they don't conduct electricity. This is why they are ideal for jobs that involve working with electrical wires. Another advantage is that they are weatherproof.
Overall, fiberglass ladders are the better, safer choice not only because of their rigidity and sturdiness, but because they're non-conductive - you don't have to worry about electrocuting yourself through your ladder if you're working around hot/live wires.
Fiberglass ladders can be damaged by sunlight, exposing itchy fibers. Eventually, it weakens the ladder, which will need to replaced.