While reviewing flags, I was offered to review an answer (10k link) to a question that was flagged as "not an answer." Indeed it is a two-year-old answer by a now high-rep user that is not an answer. It received eight downvotes over the years and was recently deleted by the author.
This surprised me because the post was already deleted and there are it seems flaggable soft-deleted answers on many, many questions. That question itself has six deleted answers alone.
I often see deleted answers by high-rep users that have been sanitized to erase the regretted answer such as "please delete me" or "blah blah blah". These all qualify as "not an answer" even though the original might have been an answer but only a duplicate or the wrong answer.
Is the purpose of such a flag to hard-delete the answer? Should I agree with a correct flag on a deleted answer? Should deleted answers in general be considered for flagging to the same standards as ordinary answers?