Well!
Yes. Hillary is “qualified” to win the mayor’s office.
But, is she capable of actually “doing” the job?
SHE has NEVER DONE ANYTHING.
Never run an office.
Never run a police station.
Never run a precinct, an administration, a department, nor an agency.
Never been responsible for DOING ANYTHING. EVER.
Campaigns? She was handed one - The NY Senate seat against an empty seat.
She lost the 2008 campaign against a junior senator who had no record.
She lost the 2016 campaign against a man who had run business empires, but had never run a political campaign.
Hilary’s only qualification for Mayor of New York City?
She is more corrupt than Tammany Hall.
But Tammany Hall was more competent.
Anyway, I would not be so sure that mayor of NYC would be anymore of a "slam dunk" for Crooked Hillary than the presidency was (which she has now lost twice despite being declared both times as "inevitable").
Also, being a mayor of the biggest city in America is much more of a hands-on job. As you state, she just doesn't have the capability or experience to do the job effectively even if she did decide to run for it and wins it. She would be a disaster but NYC always finds a way to survive.