This accident was between 2 B738's and not the biggest a/c that operate out of DUB. Many replies are arguing about the proximity of the holding points etc. etc. If this had been a B767 & A330 operating from separate runways the result might have been very different, and much worse. It is incumbent on the commander and taxiing pilot to be aware of a/c around them and be vigilant. If in doubt STOP. You can see the wing tips of nearly every airliner from the pilot's seat. Look out the side window. That's what they are there for.
Experience has little to do with this. The yellow/white line is not always a guarantee.
What could be an improvement is white lights on the tips of the stabilisers. The wing tips are far too far in advance of the crash into the tail structure. This was a prang waiting to happen and design should have mitigated against it.