given the relative frecuency with which they're impaled
Relative frequency ? I thought when a bullfighter was impaled in a life threatening manner it generally made the news – even in the UK.
I can't say I regularly hear about such events. So bearing in mind that the bullfighting industry in Spain apparently kills at least 40,000 bulls every year, it would suggest that it was a relatively rare occurrence.
In fact I believe the last matador to die was in 1985, so that works out as one matador death for every one million dead bulls. In other words, a matador stands a one in a million chance of dying, whilst the bull has a 100% chance of dying.
Doesn't sound like the matadors are taking much of a chance to me.