We debated whether or not to make this explicit in the postmortem, but yes, the operator in question still has their job, and for exactly the reasons that you o

We debated whether or not to make this explicit in the postmortem, but yes, the operator in question still has their job, and for exactly the reasons that you outlined: it was an honest mistake, they were deeply apologetic (as one might imagine) -- and we know that they (certainly!) won't be making that mistake again. Mistakes like this are their own punishment; additional punitive action serves only to instill fear rather than effect the changes necessary to not repeat the failure.