It seems like these days most places in Earth have become simply different versions of each other. How people dress, what they eat, what they know, their interests, and other such things are very similar almost wherever you go. Maybe traveling to central Africa or North Korea, or other very remote areas, would be radically different, but most travelers go to places where cell phones work and a portion of the public speaks English. Now traveling to another country is how traveling to another city was 60 years ago.
That isn't really true though, unless your itinerary is focused on the centre of major cities and you're determined to stay in chain hotels, eat international food and get taxis everywhere (if your main experience of travelling overseas is business, it might look like this)
Sure, Premier League branded football shirts turn up in the unlikeliest of places and it turns out that actually people don't wear what the internet says is their national dress all that much - that's one of the first things you learn when you travel - but there's plenty that's different, even if you can only communicate with the English speakers.
It's difficult, and you detainly have to step foot outside the tourist trails for 5 minutes, which most tourists maybe don't. If you stick to the brunch places and the tourist trap museums, then yes. But the world is still incredibly diverse; if you travel you can experience this diversity, but you have to make an effort, including research and probably learning a bit of the language.
Learning is effortful. People can travel and not learn anything, but people can not learn from many things they should learn from. Travel is something you can learn from no matter where you go, but you typically have to put in the effort.