For a foreign student, being allowed to work while studying could absolutely make the difference between making it (financially) or not. Many countries do not allow foreign students to work while studying. The article below clearly explains why Canada remains a first choice for international students who depend on a finding a job to supplement their income to pay for tuition.
International students are allowed to seek part-time employment off campus after six months of full-time study, as a way to help them defray costs. They can also obtain foreign work credentials: After earning a four-year undergraduate degree, they can apply to work in Canada for [...]