Gazumped,
Mate, you are up a gum tree here. While you are comfy in your arm chair there, take a pause and realize you are peddling a black and white viewpoint in a literally grey situation.
Further, to go below final rsv fuel you are In a fuel emergency.
A commander has the prerogative to decide he in a situation ( ie an emergency) requiring him to exercise the rights affording to him by the regulations.
No one else.
If QF had gone around we'd have seen 2 rpt 737s on min gas in the same cct with wx going pear shaped. No one knows how that would've played out.
Get off your high horse and stop be an arm chair expert.