Using lawyer or not using one,it's the same thing, it's all about convenience. like some people are to busy to do it themselves, some don't have knowledge on how to complete the forms, so they use lawyers. Fact is you don't really need one since the forms are easy. But if it will make u sleep better, please do use a lawyer. We all just want to get home to our loved ones. CIC gave the option cause they know some will need it will some won't, at the end as long as your application is done well you will be with your spouse.