With the information they had available, 100hr pilot would probably experience information overload. Are people suggesting that a VISUAL approach is a difficult task with all that information?
If you haven't done one in a long long time, it can be challenging because you are out of practice. Trying to use too much information is part of the problem.
At the end of the day it would be a walk in the park if they ( visuals) were practiced every now and again. If the pilots regularly had to arrange a message from their brain to be sent to the hand that's on the thrust levers that would become instinctive as well. Constant use of automatics removes the instinctive element that those of us who hand fly have.