"When living in remote parts you have to have a car, otherwise you won't even be able to get to the workplace in the first place."
The bus works pretty well. Every city I've ever lived in has a bus system, which is pretty affordable.
"Not everyone has that choice."
Yes, they do. They choose not to leave because it's not the path of least resistance. Going through the interview process, meeting new people, and having to learn a completely new set of tasks is not easy or desirable. I've had to do it plenty of times throughout my life.
The other problem is living within your means. If you have student or credit card debt, don't buy a house or a car until they are both paid off. If you pile on the debt, you will be putting yourself in a position where your employer will have more power over you and you will have less options.
After college, I had to rent a room in a house for 2+ years to pay off all of my debt before I could get the apartment I wanted. I bought no new electronics during this time and I treated myself once/month to some Chinese carryout (Sandwiches and $1 frozen dinners the rest of the time).
Most people don't have the discipline to do this, which is the same discipline that is required to build a successful company.
It's ironic that with so much freedom, many choose to make themselves slaves.