If ever there is an argument for moving map airport taxiway displays to be made mandatory in commercial aircraft this is it.
Which by definition means even more "heads in" than there is now
99% of taxi errors do not involve hitting anything, or even going off a valid taxiway - they just involve crossing a stopbar / taking wrong taxiway / passing the clearance limit. A MM display will not (necessarily) help here. Unfortunately this aircraft was in the 1%
What is needed is more time taken to brief, discuss and monitor the taxiing, and less "tasks" assigned by SOPs / Companies.