Logging is way more dangerous than arborist type stuff here, if you are falling everthing you cut is above you, you are usually further away from a hospital (golden hour), you are working with machinery and wood sizes that are on a bigger scale, heavier, larger,with more power. Also when you are an arborist it is one or a couple of trees a day, when you log, trees are just flying, literally. Sometimes I watch the grapple yarder when I am in a tree, it looks like a huge excavator crossed with a crane, screaming V-12 Detroit diesel, cables than run hundreds of feet uphill to a block. The log grapple on the cables must wiegh 2-3 thousand lbs., it grabs logs and yards them like a guy with a flyrod. Struck bys include trees that hit fallers, logs that hit the yarding crew, machines that hit people I believe.