Alas, as you say, there was no one skilled in either long bow-making or arrow-shooting.
Thought-provoking point issue...thanks!
It took YEARS of training to make a good longbowman. Some of those bows had over a 150 lb pull, based on reconstructions of bows taken from the Mary Rose.
On the other hand, you could create a decent shot with a musket in a few weeks training and perhaps a good rifleman in manybe a few months of heavy practicing.