If these two have taught me anything, it's that there's a difference between trust and ignorance.
"We would never do that."
The chances of me getting shot by my best friend the second we meet up the next day are low, but never zero. Now put that in the perspective of these two.
Bruce and Clark are besties, they trust each other with their lives. But at the end of the day, one of them is still a walking apocalypse that at any second could just say "wouldn't it be funny if..." and just levels detroit with a cough.
Planet earth had the potential to be thrown into slavery both times a viltrumite decided to crash out and there wasn't a damn thing Cecil could do about it. His only defense was Hail Mary cause it almost took out Nolan, and Mark, who got bitched both times he squared up with a viltrumite. And guess what? Mark is still a walking apocalypse.
You will never catch me saying these two are in the wrong. Morally f'd up? Oh yeah, 100%. But logically? Nah, I'd have a red sun "hammer of dawn" tracking Clark at all times and have suped up jbl speakers scattered around the nation for Mark.