20 crashes, At out current level of airline safety, how many flights would we need to fly to get to 20 crashes. We must be close to around 1 crash a year? So

20 crashes, At out current level of airline safety, how many flights would we need to fly to get to 20 crashes. We must be close to around 1 crash a year? So 20 years... In 1 year we have around 20 million flights... 400 million flights to get to 20 crashes. I'm gonna assume advanced aliens are at least an order of magnitude better. There isn't a billion of these things in the sky.. So yeah, there safety level for such an advanced thing seems a bit shit. I just don't believe they would crash this often to even have 10-20 crafts. The whole premise seems absurd.