Anyone can choose to be self employed and find work yourself week by week it’s not all clover, there are no paid holidays, no sick pay, no employment rights, no pension rights.
There are plenty that don’t make a go of it and take a full time job, or more likely take a part time job to make ends meet. If you are very smart you will do well self employed , if you’re average, forget it, get a proper job even if it’s stacking shelves.
A friend of mine is typical, he builds and fits kitchens, he probably has £100k in machinery and rents his workshop, he is good at it but is pressured on price always and works 60 hours a week. His wife is a senior nurse and earns double his income for 36 hours, she runs a Mercedes SUV, he has his work van .