"Travel while you're young" is a scam to keep young people from being able to afford property.
Title speaks for itself really.
If you spend all of your savings going partying in Ibiza or backpacking through SE Asia or just travelling abroad a couple times a year it's enough to eat into a house deposit and knock a property purchase back a decade or more.
Keeping more people trapped in the rental market for longer.
For example. My cousin was planning a big wedding with his fiancé and a house purchase for after they were married. They've become obsessed with influencers that are "full time world travellers" that earn money by posting videos of their travels online.
Two days ago they announced that they're delaying the wedding, pulling out of their house purchase and are now going to spend the next year travelling the other side of the globe with every penny of their savings.
And I'm not against travel at all, me and my partner spend around £8,000per year on holidays all over the globe. But we are homeowners, we made a plan to not travel for a couple of years so that we could buy a house and then travel as much as we like without worrying about savings for anything because we've already got it!
EDIT
Just to clarify, I'm not against travelling while you're young at all! It just feels as though young people are being pushed to prioritise it over buying property and getting themselves set up first. Thus keeping them trapped in the rental market.