The "Black death", that apparently wiped out about a third of everyone in Europe, was 700 years ago.

The 90% loss of life in Creation was The Great Contagion + The Balorean Crusade (+aftermath from both, I assume). Considering it was a 100% (well, 99,999% if there are survivors in pockets out in the Wyld, but anyway...). So the Blessed Isle probably had at most a loss of 2/3, which was from a very large population.

So in my mind, the Blessed Isle was hit hard, and for a while, everyone was busy focusing on production for survival. So craftsmanship that wasn't...