If there are too many tasks while taxying you stop them or set the parking brake. All of the crew pays attention to the here and now. Taxying in an unknown area with minimal lighting (if it was well known to the crew or well lit.....) all heads are up. No exceptions.
I'm sorry are you a private pilot?
See? There's denial about this issue.
And no, I'm not a private pilot. I logged many thousands of hours on this type of aircraft without hitting anything. But I am now old and wise enough to admit that unnecessary distractions lead to more close calls than there should have been.