Problem is Jassy that sometimes you have to move away. I did at 18 to work in London, and from thence to the west country when we got married, so after 18, I never lived near my parents again; until my Mum moved down to be near us when I was 35 and she retired.
You also have to go where the work is at times, even if it does mean upping sticks to do that. Brussels wouldn't be my first choice, I'd prefer to be in our home in Cornwall, but Brussels is where dh's job was and is, so here I am, and have been for the best part of a decade.
I think people are afraid of change sometimes.
I would also point out that continental rental contracts are not all they are cracked up to be, and in fact, English contracts are far more beneficial to the tenants than Belgian ones. I speak as an English landlord and a Belgian tenant.