You, as a creative, invest in equipment that you do not always need yourself. With Gearbooker you can make sure that the equipment is used more frequently, and you can also earn some money in doing so. It is nice to be able to earn back the investment.
Additionally, it is not always necessary for everyone to own their own camera, lens (or fill in other equipment) themselves. Not very beneficial for your wallet but that goes for your footprint on this planet. So it basically works both ways. And, you meet fellow creatives through Gearbooker and you expand your network in a fun way!