I beleave the definition of "high heels" has to be explained.
Is he asking for using 6" stiletto sandals or is he asking for wearing boots with 3" block heels?
I can understand that very high stiletto heels may not be the right footwear when working in a pub....
In my point of view, it looks the way it should look...I might have a twisted point of view about footwear, but for me flats does not look normal.
On your picture, it all looks normal.
Well done!..