Certainly. Currently, most refusals are pro forma. They're a form letter, perhaps with something checked off, but often with nothing checked off, so applicants are really given no insight into why their applications were refused. This means that they don't have an opportunity to address whatever the perceived deficiency was.
If they decide to file another application, if they even have a right to file another application, they may not be addressing whatever deficiency there was without, for example, doing an access to information request and getting a copy of the GCMS notes. There are all kinds of extra steps that applicants need to do and those extra steps take resources from IRCC.
Giving clear and complete reasons for refusals will reduce some of those extra steps and may actually reduce follow-up applications if the people genuinely don't qualify. It will reduce people going to Federal Court. I am aware of lawyers who will go to Federal Court simply to get the reasons for refusal. Obviously that is incredibly resource intensive for the courts and for IRCC, and not a good use of anyone's resources. Certainly there are efficiencies to be found there.