Generally, what he's saying here is a really good idea and it's a good practice to the extent it's possible -- but, at the risk of beating this particular metap

Generally, what he's saying here is a really good idea and it's a good practice to the extent it's possible -- but, at the risk of beating this particular metaphorical dead horse, this is why the concept of "privilege" as we know it today came to be. It takes a certain level of privilege to be free from "identity" constraints; put differently, the advice in this bit is FAR easier said than done for many.