The reason is that this is a thriving field which is recruiting a number of representatives and travel agents who look out of all minute details of their clients while travelling. Travel agents help their consumers to make their travel arrangements, routing them about the targets and needs which can arise to them.
These agents hold extensive information about diverse travel deals. They are the best option to direct people to which arrangement will go best with them and will give them greatest return for their funds. Travel planning requires lots of things to get considered which include online reservations, advance arrangement of hotels, arranging for sightseeing trips, etc. It is therefore suggested that the organization of all of this is left to a professional and that is what travel agents are for.