Good point pucka,
I'm fresh off 737 classic onto the Bus and visual approaches were flown AP/FD off, A/thrust off.
The bus is flown AP/FD off bird on but speed is still managed.
If this poor dude came off the bus he might have resorted to the 'Bus managed speed' mentality and neglected speed management which could have been manual thrust. Wouldn't excuse not monitoring the basics of flying.
In any case very sad for all involved.