If I was trying to convince someone as to the relative safety of GA, the LAST thing I would want to compare it to would be motorcycling, regardless of whether the statistics are accurate or not.
I have ridden bikes for 25 years, and have today sold my bike, helmet jacket, boots, the whole shebang, because I KNOW that after all the miles I've done, and all the accidents I've had, I'm on borrowed time.
Like all good politicians, I would be tempted to find some statistic that SUPPORTS my argument and then massage it accordingly!