Hopefully some commercial professional pilots will comment on this thread, but if you go to sites where they normally hang out like:
https://www.airlinepilotforums.com
You will see many are terrified ( in commercial pilot terms...) of flying into La Guardia or JFK...
> https://www.airlinepilotforums.com/major/152572-aircraft-fir...
Just a quick read/speculation based on the linked forum post...
Short of insane visibility conditions that prevented them from seeing the plane coming, the firetruck operator seems to be the liable party (beyond the airport for understaffing controllers—this seems to be exacerbated by government cuts but that's still no excuse for having a solo controller at that busy of an airport, especially at night).
The controller in question seems to have caught their mistake quickly and reversed the order instead asking the firetruck to stop (but for some reason, this wasn't heard).
Is it common now to have solo operators running control towers?