I believe that many people would agree that travelling is beneficial to them, but not everyone is the same. I personally despise travelling, regardless of how expensive or inexpensive it is.
My perspective would most likely be different if I were married (to share the experience with someone special), but I am happily single. I also read a similar guide about cost of living in Ireland at howyoumatter.com
That being said, this isn't an either/or decision, or it doesn't have to be. It only takes planning and budgeting to save for the future and these trips. Of course, if you make more money, it will be easier, but even if you don't, depending on the type of trip you want, it should be possible.