The result of the convention was the creation of the Constitution of the United States, placing the Convention among the most significant events in American history.
maybe because they could get more better and stress-free jobs
Because economy within a certain region will be heavily depended on what resources that are available in that region.
Since the Arabian Pennisula do not possess a good climate to produce agricultural products, it's almost impossible for agricultural sector to flourish in this region, and therefore they focused their economy on things such as oil, silk, zaitun, etc.
