Maybe so, but the lines are there for a reason. They protect you from this sort of problem. I would be surprised if there was not a NOTAM out detailing the work and the permitted use (or not) of the new tarmac, so they should have known.
Mr.Buzzy
There most certainly are times when you dont follow those pretty lines that apparently absolve you from all responsibility.
The point that your pompous little rant doesn't recognise, is that when you are asked to deviate from a centreline, a lot of work goes into ensuring clearances are maintained, and that the new route doesn't expose the crew or aircraft danger. If you are on the centreline (or approved other path) you are, essentially, absolved from responsibility if you suddenly find the taxiway turns to quicksand.
A taxiway centreline is a bit like an altitude clearance, there to be followed. Whatever the reason for it (misunderstanding, distraction, whatever) the human factors here will be simple. It doesn't require a uni background to figure that out!
Sometimes, the responsibility of being the captain involves simply raising your hand and saying "I screwed up".
You may understand this when you graduate from Flight Sim 2000.