First off, in nonregulated fields such as design a degree is largely irrelevant. Likewise, and particular to your question, there are many other fields that also have no regulations. What I mean is you can be a programmer with no degree, you can be a marketing manager with no degree, you can be a carpenter, a painter, or a candle stick maker with no degree. So someone who studied graphic design could go into any number of other fields. I know a few of my own classmates that have gone on to do sales, robotics, chef, and baker just off the top of my head. Not to mention myself who is now a marketing manager. So yes you can go into other career paths. Even ones that do have certifications and licenses required it just means you'd have to do a bit more work to switch - prerequisites and whatnot.
Now with that said, technology comes and goes. The important parts of your education are learning to think critically, solve problems, adapt, communicate your ideas, and meet deadlines. In addition to that it will be an opportunity to network with peers, professors, alumnis, fraternities, and all sorts of other student organizations.
Finally though, you learn these very same things about thinking critically and solving problems and all of that in any program. So if you have even a slight inclination to do an advanced degree in a different field I would go that route and do design on the side. It will be much more time consuming and costly to go from undergraduate degree in design to a graduate degree in physics for example as a result of the missing math and science courses you'd have to take.