edit: another pt to consider, if any of this turns out to be true - this is really insane, because most of us think "aliens" like one species.... but according to the many abductions and encounters in the past hundred years we may very well have been visited by TENS of different species... which may also explain the crashes, like it's not just one species/propulsion tech that is repeating their errors. Many different craft shapes too, point towards different tech, different points of failure.
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.
I'm sure they are, at air travel. I think it would be reasonable to assume that some very complicated physics would be required, many orders of magnitude more complicated than air travel, which was first done with leg power, using some spare bicycle parts and various dead plants.
Plus, space is so vast and lightspeed is so slow, I can't imagine plotting a trajectory to avoid stars/planets would be at all difficult for a society so advanced.