My problem with the series is the premise that invasion of another star system is worth it.
With all the resources Trisolarians put into colonization of Earth, and all their superior technology - they could've made space habitats that had perfectly safe orbits around whichever star they prefer, and put all of their citizens on them.
What's the point of risking mutual destruction by hunter in the dark forest (and we know they were afraid of it since the start), if you can create habitats in your own star system, or choose any nearby uninhabited star system if the 3-body-problem is really making it impossible to put these in your own system (and realistically - it wouldn't be so bad, just make a dyson swarm around the whole system.
With all the resources Trisolarians put into colonization of Earth, and all their superior technology - they could've made space habitats that had perfectly safe orbits around whichever star they prefer, and put all of their citizens on them.
What's the point of risking mutual destruction by hunter in the dark forest (and we know they were afraid of it since the start), if you can create habitats in your own star system, or choose any nearby uninhabited star system if the 3-body-problem is really making it impossible to put these in your own system (and realistically - it wouldn't be so bad, just make a dyson swarm around the whole system.