You tend to realize this after you've done this experiences. If you don't, you'd miss out something and somehow you will get it back later.

I know of people who got married before 20 yo, been together for a decade, got kids an all and after that one of the partner walked away because "I'm missing something out, I want find myself".

Traveling is a way to learn new culture and see things with a different lens so I'd definitely not remove that from the experience of person on their 20s