I think "whole self" is a complicated thing. It usually leaves out a lot of human behaviour and experience -- from the bathroom to the voting booth. If you accidentally share the wrong "whole self", it can get you in trouble. Or fired.
However, orgs that have this policy also usually have some "borderline" zones where it's possibly safe to disclose part of yourself, like LGBTQ+ identity or mental health. Disclosing proactively can be a safe harbour, sometimes.
I think it's a fraught issue.