They are incredibly complicated machines, and you don't have much chance to test them in realistic conditions without just firing them. They tend to fail much m

They are incredibly complicated machines, and you don't have much chance to test them in realistic conditions without just firing them. They tend to fail much more early in their life, so you'll see a lot more explosions with newer rocket designs. (this is this design's first flight) Most launches to orbit are successful, I think by a wide margin. Worth noting too, that even the rocket going off course usually means it has to be intentionally exploded by an automated system or manually by a range safety officer since that's the safest option.