It's a variation of the old bang, bang with the spacecraft only carrying part of the explosive material, perhaps enough to slow it down at its destination?
I must admit I didn't think of initiating a fusion explosion by such an intricate way.
Although when I first heard about the bang, bang idea I thought it would be applicable for lunar landings and take offs if the right chemicals could be found on the moon to supply multi barrel machine guns with explosive bullets.
It's divergent from what will probably be told to the taxpayers when the machine guns are being funded. "It's a propulsion system that will take us to the stars!"
No... it's a weapons system that will ultimately be used to oppress and destroy.
I see it oppositely. Lubin got funded for DESTARS by The Space Amygdala Brigade who will unwittingly have helped us go interplanetary and interstellar. Har Har Har.
Clearly you can't get a probability that's overunity. So the correct answer is a statistically significant distribution and all the interesting stuff lies in the tail on the high side. Except the number is in the tens of billions for this galaxy alone, and so the tail is meaty, beaty, big and bouncy.