The problem is that if IRCC find out that your husband is sponsoring you for green card, it tells them he is not ready to move to Canada, when it is expected of him to move to Canada. Husband applying for green card tells them he is not ready to move to Canada or have any intention to move to canada and settle. They can deny him PR status. There have been cases of PR denial because applicant said he / she need to finish university before moving.