Travel is not a _cure_ for the mind. There is no cure for the human condition.
It's better described as maintenance. If I'm feeling cooped up indoors and I jump on the metro and go to Chinatown, does that cure all of my existential ills?
No, but it's fun, and tomorrow I can go somewhere else.
The same is true of all activities. I quit my job a while back and now I'm studying full time. Is that going to scratch my itch forever? No, eventually I'll get bored and want to do something else.
But now I've done more different things, I'm more well rounded, and I experienced a lot of joy over and above what I'd have if I just sat in the office counting beans all year.
I'm going to meet some friends this afternoon, and that's not gonna cure my mind either, same as eating lunch doesn't cure hunger.
Travel can be seen as an escape for the mind. It's heroin for a daily life that could be improved.
We often say a vacation "keeps you sane" however in the context of travel as a drug we might rethink that notion.