College students should base their choice of a field of study on the availability of jobs in that field

Availability of jobs depends on the demands of people in that particular time. Job market is always changing and based on the market the necessity of people for different fields are also changing. And the field that students will work in future for earning money slightly depends on the subjects or fields will be chosen in their college life. The prompt is suggesting that college students should try to find their their college life. In my opinion I mostly disagree with this suggestion that college students should bound their opportunities to choose their favourite subject or the paths they want to walk through because of the following two reasons.