Fiberglass is more durable than many realize. I have owned numerous boats, glass and aluminum. Lots of pros and cons on both sides. I settled on glass for bass fishing due to a more stable ride, less movement when you move around inside the boat and with less vibrations in rough water. Glass boats tend to be somewhat more refined with better box lid protection from water intrusion. There has been improvement with that in recent years but a lot of metal boats still have leaky lids. I found my metal boats to be hotter- inside and out, during bright hot days on the water.. Metal boats generally move around well in shallow water more easily with less draft so that can be a plus in many situations. That can also be a problem on windy days. There are times when I would love to have a choice of metal or glass depending on where I will be and what conditions. Not practical to maintain that option. It is a matter of personal preference.
Most important think is to be out there on the water- the fish won't care what you are fishing from...