I think I know why there isn’t more advanced life out there: as we do bigger and bigger experiments, the chance of making a mistake that can end planets increases as we are more technologically advanced..
Funny you should mention that, because fusion plants are pretty much inherently safe from that point of view. From wiki:
>Runaway reactions cannot occur in a fusion reactor. The plasma is burnt at optimal conditions, and any significant change will simply quench the reactions. The reaction process is so delicate that this level of safety is inherent.
The main danger of nuclear fission is that it destroys your finances by going grossly over budget. Fusion is likely to be worse in that respect, being both much larger and much more complex.
Fusion isn't going to "end the planet". You really should read more about it. It's extremely hard to get fusion to happen in the first place in a controlled manner. There is 0% chance of it going critical
