Thank you for the question.
An example that I've personally faced, and I know others have as well, is the amount of information required up front before a request can be processed. As an example, if you're filing an access to information request about records related to a person's misconduct or about an individual who may have assaulted you or harmed you, you're required to provide their service number. The service number is a protected piece of information. To ask a potentially victimized junior member who might not have access to that information to provide it is an immediate barrier, and for them to go to their chain of command to request that information might allow them to be identified as a potential record requester, when the process is designed to allow them to remain anonymous.