If was going to go tin foil/Alex Jones on this, I'd probably say they have to act that way to keep their sponsors because they want to sell the message that you can freely travel around the world to 'explore different cultures' and in turn unconsciously support more globalist policies since if we can travel freely anywhere, why do we need national governments when we can have one global one...

But if I was to approach with my jaded outlooks on life, it's probably because they lack the talent of the bigger vloggers that travel around but can easily survive on patrons alone so need to be a passive wall that can easily be plastered on by advertisers.

The most I watch in travel stuff is either historical stuff, some Japan abd a lot of abandoned places because I have a slight interest in restoration work.