You list down all the things I learned from travelling. I totally agree to everything you just said specially this part

To all intents and purposes one of the endless merits that travelling can attribute to self development is it pushes you out of your comfort zone.

I was scared of travelling on my own before so I started going on trips with my friends first to get the hang of it. And over a year ago, I decided to go solo backpacking in Myanmar. It definitely pushed me out of my comfort zone. It was worth the experience and I'm glad I did it.