In reply to olddirtydoggy:
Several points.
Falling off easy trad routes, there are often things to hit on the way down. Or the route is slabby, so the whole route to hit on the way.
Many trad routes that are popular seem to be on grit type crags, single pitch and often short. Therefore good ground fall opportunity. If they are longer, then there are frequent ledges as they follow natural features.
Good belayers are rare, dynamic belay on trad helps stop the sudden jolt of a snatched belay, especially on a fall low down or on a short route.
If comparing to sport, many climbers climb 6a or 6b. That's e1 to e3, which is not the same terrain as a severe or vs with respect to steepness or ledges.
Trad routes take longer to climb than sport per meter. Therefore more time on a route, more chance of an event happening on a trad route.
Sometimes you get injured, sometimes you get lucky. Can't always avoid fate, though one tries to put it in ones favour by risk management and skill.