People with a physical trade can travel where ever they like as it suits them, and many do travel to different cities and to different countries chasing more work and better pay. Only fully qualified tradesmen get to do this though:
Electrician
Carpenter
Brick Layer
Roofer
Mechanic
Diesel fitter
Etc.
Rodafina's suggestion is a good one. Many years ago I knew a girl that got a job working on the Murray River Queen as a waitress. That's an historic paddlesteamer that does river cruises. When she got bored with that she jumped on a plane to Bali and got a job working in a bar there, then she went island hopping up through all of the Asia Pacific and then in to China. She worked her way through China and up in to Mongolia, then headed west through Russia and Europe and in to the UK. Then she went to Canada and worked her way from north to south through the entire continent, leaving Argentina 4 years later to return to Australia.
She not only had a lot of fun, she also earnt a lot of money and came home with enough in the bank to get herself well established. She moved to Queensland after that and became one of the trainers for our Olympic diving team.
Doing that sort of thing requires incredible social skills though, and it's definitely a lot easier for a very pretty young Aussie girl with the big smile, the accent, and the laid back attitude.
If your friend's batchelor degree is in something that is in high demand in other countries then that will also give the opportunity to travel on a Working Holiday visa but that option is only open to people less than 35 years of age.
https://immi.homeaffairs.gov.au/vis...ng/work-holiday-417/first-working-holiday-417
[Edit] Just thought I should add this - A lot of people dream of travelling but when push comes to shove they can't stand the thought of leaving friends and family behind. You can't have your cake and eat it too.
It reminds me of the parable of the monkey that's caught because it's hand is stuck in the olive jar. It's hand wouldn't be stuck if it would just let go of the olives. Many people are like that monkey, too afraid to let go of what they already have in order to chase their dreams. You only get one chance at life, live it how you think is best.