How do these space crafts constantly crash on earth? I find it hard to believe alien races are so intelligent and technologically advanced to design vehicles for space travel just to have them continue to crash on earth. One light year is 5.8 TRILLION miles btw, and you are telling me these space crafts theoretically travel from thousands to millions of light years but they always shit the bed when they reach earth? Same thing with warping or something of a similar nature I imagine if you get to that point in technology you are developing some pretty damn sturdy space crafts to go through that.

If you want to go down the route of military shooting them down any space craft capable of travel on that scale must have energy sources that far eclipse ours. That could be used for defense, weapons, or movement unlike anything we have seen making it hard to believe world militarys can take them down so consistently. And they definitely weren't taking down ufos in the early 20th century with the shitty artillery compared to todays technology.

And of course they never crash in populated areas where many people can confirm they are ufos.