3 Body Problem has a big plot hole nobody is talking about

I started watching 3 Body Problem on Netflix a few days ago with tempered excitement, considering the show comes from the destroyers of Game of Thrones. That's probably something that will always remain with David Benioff and D.B. Weiss, no matter how good anything they do after Game of Thrones is. But I have to say I loved 3 Body Problem more than I thought I would. 

With each episode, I'd immerse myself more in the story, trying to figure out what's going to happen next. I didn't binge 3 Body Problem...