The sarcastic answer is that there IS NO POINT of a gallbladder in that you will be just fine if you get your gallbladder removed. However, the gallbladder would not be part of the human body if it didn't have an original purpose, even if that purpose only has to do with human evolution (as is the case in regards to the appendix).
The image in the above answer is a good one to show the "point" of the gallbladder, which is a tiny little organ near the liver. You can learn a lot about the "point" of the gallbladder if you split the word up into its roots: "gall" and "bladder." The general definition of a bladder is something that holds something else. In this case, this bladder holds gall. Gall is simply nasty juice called "bile" (made in the liver) that helps digest fat. The bile is eventually let out of the "bile duct" in order to continue the process.
I can also end with a personal anecdote in that many of my family members have gallstones. If one of those little things blocks the bile duct in the gallbladder, it will have to be removed. Why? Intense pain! And the irony is that some people can have a gallbladder FULL of stones, but never have the duct be blocked and feel just fine. I can see why you got to the stage of asking "what is the point." But simply, it is this: the point of the gallbladder is to store bile in order to digest fat.
The gallbladder is a small organ which is located near the liver. It stores bile juice which is a special fluid produced inside the liver in order to break down fat contents and also helps to digest the food.
The gallbladder is a hollow organ that sits just beneath the right lobe of the liver.it is shaped in the form of a tapered sac, with the open end opening into the biliary tree and duct.
The picture in the attachments shows the Gallbladder.
The gallbladder is a pouch that is under your liver. The purpose of the gallbladder is to help the body digest fats through ducts in which bile is stored. Your body can function without the gallbladder as bile has other ways to reach your intestines to digest foods and fats.
A gall bladder is the small sac-shaped organ beneath the liver, in which bile is stored after secretion by the liver and before release into the intestine. Bile is made and released by the liver and stored in the gall bladder. The bile helps with digestion by aiding enzymes to break down fats into fatty acids. These acids are then taken into the body through the digestive track.