> Very very few people “viscerally see how people live and value things differently” when they travel. ... Actually living in a different place will certainly do that, but “travel” almost never will.
Take one extreme case: a typical college grad doing a euro-trip to 10 countries in 14 days. They will certainly not be able to experience those cultures deeply, but compare that person to someone who never went to Europe, never saw their respect for the past, train travel, food cultures, and the high value they place on vacation.
Even consider those young travelers that mostly stay within the confines of their hostel and their group activities, or in a national bar where things appear familiar and comfortable: they are still better off than if they just stayed home and had not seen any of it.
Certainly, 10 days of travel is not much, but it's a lot more than 0 days. For some, those 10 days may be truly meaningful and eye-opening, for others, a familiar party with different scenery. Traveling is generally uncomfortable and different, and the experience can add something to even the most shallow traveler.
(caveat: It happens, although uncommon, that travel can be a detriment. Particularly, when someone goes to a country that is poorer than theirs, and attributes their lack of development to some genetic or racist defect. While this is possible, I do think it's exceedingly rare. When one sees how other people live up close, it's natural to look for the patterns and similarities rather than come up with differences.)