If even someone with Rachel's level of experience still doesn't know all the minutiae of database optimization, I think that just amplifies her point about the importance of mentoring novices.
They then went on to list the errors that this brand new entry level employee had made when writing ... an authentication system ...
I was more than a little shocked when I realized they were serious and hadn't realized the issue was sending the new entry level guy to do that job alone.
I've always seen authn. Where'd you pick this usage up?
For my part, I have not encountered "authn", "authz", or "authk" before. But prior discussion did not even mention the word "authorization", and that seemed worth bringing out in the open.
So, not nonresponsive, just responsive to things you weren't personally interested in.