I've heard the word travel etymologically is related to the word for torture, probably because throughout history travel could be difficult and people were subject to many dangers
Monks would be encouraged to stay in their cell to focus on God and not be distracted by the world through travel, in contrast to the "traveling constantly" ideal
It can be expensive to travel; we can "travel virtually" for much cheaper
But some things may require travel, like meeting new people or being at specific places to work on things
edit: there's also a lot of different forms of travel; for religious purposes, there's the pilgrimage, while in modern times some have made travel in to a form of volunteering which may change the dynamic of the nature of the travel