If you think about it: Magnus, is Magnus. He has an aura about him. People make blunders playing against him they wouldn't against others. This is known. Magnus is ALSO very good. But that "aura"... doesn't hurt him.
If for whatever reason, Hans saw far enough ahead, to not be worried... and Magnus hadn't, what does that say about Magnus?
He mentioned Hans wasn't nervous, in comparison to Magnus he had nothing to lose.
I won't defend his prior cheating. I will say: Prove it Magnus.
---
I'll draw a parallel to a game I have played at the national / international level. Bridge.
Bridge has had a TON of cheating scandals. People knew something was fishy. But they took the time, watched the videos, and figured out what happened.
Recent ones during the time I played:
https://en.wikipedia.org/wiki/Fantoni_and_Nunes_cheating_sca...
https://en.wikipedia.org/wiki/Fisher_and_Schwartz_cheating_s...
A whole article on the topic:
https://en.wikipedia.org/wiki/Cheating_in_bridge
... I want the smoking gun Magnus. Not your gut.