I don't think people should necessarily have to be [member of X group] before they're allowed to have opinions on [things relating to X group] cause all that means is that you're excluding 1. Members of [X group] who value their privacy, or are closeted, or want to avoid torrents of group-membership-based internet hate should they be public about it and 2. People not in [X group] who are decent enough people to listen when others tell them to stay in their lane.

You are, importantly, NOT excluding people who are shitty enough to just lie and say "yeah I'm a member of [X group]," and in fact making their voices proportionally louder.