If we go back to the first dialogue of the serie we can deduce that the truth that emerge from ep.5 can’t be the “real truth”:

Because their hands are too slimy and when they try to climb down they slip and smash on the ground.

It's not about what is true or false. I'm just analyzing the storyline credibility. When you step into a potential narrative hole your attention deflects from the story. But maybe it's a purposed clue that leads to the real truth.

He cut the lines then went cryo sleep.

They had a conversation in 2014. Then Pilcher and Burke and Pope and everyone went nap time.

2000 years is lightning-fast for evolution