Okay, let's do some maths shall we? Using wikipedia as a source.
Of 237 competitors killed on the TT Mountain Course, 101 were in the Manx Grand Prix. As this is a separate event, Im not including these for the purposes of this example. I'm also not including deaths of officials, in unofficial timed events, parade laps and the two spectators.
So that gives 136 deaths in 100 years of the Mountain Course. So, 1.36 deaths per year. Given that the course is 37.733 miles long, that gives 3.63077412 deaths per mile. And 0.03630774 deaths per mile over 100 years.
Given the number of competitors overall (around 50 to 80 in average solo classes nowadays), the number of laps done (again, for anyone who didn't read my earlier post, this ranges from 3 to 6 laps of the 37.733 mile course) over the 5 solo and 2 sidecar (i.e. rider and passenger) events over the course of race week, not to mention a week of practices - the event does not deserve it's "bloodbath island" reputation.
Maybe someone better at maths than me can work this out in more detail as it's too many averages for me to calculate on my phone.
Now, don't get me wrong; it is a very very difficult course to learn and has unique dangers. But again, I stress, no racer lines up to leave the start without knowing the risks and dangers. They will have worked hard to gain enough "signatures" to be allowed to race the TT. Their wives and girlfriends (and yes - husbands and boyfriends!) will have had to come to the acceptance of their partners choice.
Yes, ultimately, it is a selfish act. But, so are lots of other choices - to choose to smoke or drink for example.
I know my brother died because of his selfish choice - he never saw his daughter born because he chose to race in the TT. But do I believe he had that right? Damn right I do.