Some people like travelling in company, especially if they're Asian and accustomed to constant company.
Travelling to western countries might also be slightly intimidating- yeah, it's Sydney so hardly the wild west, but being presumably Asian, it's not much like some Western backpacker travelling through Thailand on an extended piss up.
So at least these two people are making an effort to get out and see the world- I think they could do without the snide bs about travelling psychos and cultivating virtue via solitude.