He is absolutely right. See if you qualify as a permanent resident and once accepted you can study once you arrive and benefit what we benefit.
Never say as he said that you plan to apply for permanent residency, you would be cancelled for sure.
If you don't qualify for PR but for student visa and come to canada. Before apply for PR..you have to have your term finished and wise to have a job offer. If you do, you will have the opportunity to remain if they accept.
Also now you can apply for a student to work off campus, so if you do get a permanent job, you can therefore once you are finishing your term, apply for PR mentioning that you do have a permanent job, and a letter from your employer that he wishes that you remain in his employement.
I did just that for a friend and gave the date that his schooling was finishing and accompanied with a job letter and he was accepted.