Let's turn that around. Can you make a case for never traveling, i.e., for staying at home, or a case against just staying at home? I would say that the case against staying at home, i.e., against "never seeing what the rest of the world is like", is compelling.
I grew up on the West Coast, in Southern California, then in the Pacific NW (Seattle area). I guess I tended to believe that the rest of the country was just like the West Coast. Four years after I graduated from college, in 1970, I took a job in suburban Pittsburgh, PA. I was appalled at what the living conditions, particularly the air quality and the road conditions, were like there. I'd seen Seattle repave a road that was in better condition before being repaved than what roads in Pittsburgh were like after being repaved.
Back then, Pittsburgh, particularly in blue-collar neighborhoods, was the epitome of "don't travel". A friend told me he was talking to a man in a bar in Homestead, PA, and the man bragged that he had never been out of Homestead in his life. A secretary where I worked told me that she was eighteen when she went to downtown Pittsburgh, a 12 mile drive from her home in McKeesport, for the first time.
A few years later I was having dinner at the home of a girl I was dating, whose father was a steelworker in Duquesne. I remarked that the reason people in Pittsburgh tolerated the poor air and roads was that they had never been anywhere else and didn't know it could be different. To which her mother said, "People are the same everywhere (point, set, and match!).
My apologies to anyone from Pittsburgh. I know it has changed a lot in fifty years. This is just what it was like when I first moved there.
So, no, travel is important, if only to allow you to judge your own environment against what it could be. If I hadn't traveled, I wouldn't have known, for instance, that windows can open more than one way or that toilets can have "small flushes" to save water, or that not everyone in Europe speaks many languages, or that (please note, Ramaswamy) not everyone in the world has air conditioning.