Here's another shameless plug for a video produced by Tod's Workshop, this one offering good descriptions of the types of arrowheads used by Medieval archers.

The mass production of arrowheads -- the whole bowyer industry in fact -- was highly efficient, and a respected trade. It had to be to support the large numbers of archers English who were mobilized nearly every fighting season to support operations in France, Scotland, or Wales.

Still, like any mass-scale effort, inefficiencies appeared in the final products: warped or unseasoned arrow shafts, brittle or improperly brazed arrowheads, poor fletching. Similar issues were found with bow staves, the production of which in England was a royal monopoly. The crown controlled all imports of yew. Most of the timber for bow staves came from Spain and Italy.

It wasn't enough for archers to develop the strength and coordination to ply a bow. They also had to possess the skills to maintain whatever the royal armories provided them with for a campaign. I like to think many archers could braze arrowheads, craft their own bow strings, repair or fabricate arrow shafts and nocks, fletch arrows, and given time and access to raw materials, shape new bow staves. And in addition to all of that, they had to be proficient in whatever personal weapons they carried: sword, falchion, axe, etc.