To me, the point of "blameless" PM is not to hide the identity of the person who was closest to the failure point. You can't understand what happened unless you know who did what, when.

"Blameless" to me means you acknowledge that the ultimate problem isn't that someone made a mistake that caused an outage. The problem is that you had a system in place where someone could make a single mistake and cause an outage.

If someone fat-fingers a SQL query and drops your database, the problem isn't that they need typing lessons! If you put a DBA in a position where they have to be typing SQL directly at a production DB to do their job, THAT is the cause of the outage, the actual DBA's error is almost irrelevant because it would have happened eventually to someone.