General Education gives you an overview of knowledge. Okay, you have to eat, sleep, and get a reasonable amount of recreation. You can't learn everything (which is not an excuse for learning nothing). But you can learn how everything is organized, so that you have a reasonable idea what scientists, social scientists and people in the humanities do. You can also learn enough about these fields to have some idea how they work so that when (these days, it's when and not if) you are thrust into the situation of having to become the group expert on some topic totally alien to you, you'll have a good idea how to go about doing it.
General Education gives you a basis for making informed decisions. Gilbert and Sullivan's Modern Major General appeared on stage in the late 1800's. At the start of the century, wars were fought with sailing ships, muskets, and neat blocks of soldiers lined up on the battlefield. By the time Gilbert and Sullivan wrote, wars were fought with battleships, repeating rifles, and machine guns. The Major General was amusing in 1890, but in another two decades or so people very much like him would send infantry waves against machine guns. At the Battle of the Somme in 1916 the British and French lost nearly as many men in one day as the U.S. lost in Korea, despite the fact that the U.S. Civil War had shown - fifty years earlier - how futile frontal attacks on trenches were. Still think history is irrelevant? The U.S. Air Force puts the matter bluntly: "What you don't know won't hurt you - it will kill you."
General Education lets you know what your options are. I got my first exposure to computers in the punch-card days of 1964. (For those of you who don't remember, once upon a time computer data was stored on punched cards. You can always tell someone who remembers those days if his face turns white when you say "shuffle the deck." This was just before I got drafted to help Hannibal attack Rome.) When my neighbors heard I was working with computers, they all said "That's great. You can get a job as a key-punch operator." Even with my rudimentary knowledge of computers, I wondered "Why would any rational human being with a choice decide to be a key-punch operator?" My neighbors didn't have a clue what computers were for except that they provided a (temporarily) secure, mindless job. They had no idea that there were any other jobs in computing.
You might make a good biologist, or historian, or psychologist, or something else totally outside your present horizon. You might be very good at something you now think you hate. You'll never know unless you get some exposure to the different branches of learning.