[jandrese]

The sophons were basically deus ex machina particles for whatever the author needed them to do. They were omnipotent, undetectable, able to be everywhere at once, had unlimited energy, and apparently are no good at all for scouting out other uninhabited solar systems to colonize (so they don't have the Dark Forest problem with Earth during their journey).

If the Trisolarians had sent them out in various directions to scout out solar systems they could have avoided so many headaches.