So in season 2, episode 7 of The Flash ("Gorilla Warfare"), the ginormous, hyper-intelligent gorilla Grodd makes a comeback. The heroes (mainly Caitlin) discover that he really just wants the company of other hyper-intelligent apes like him, and the Wells from Earth 2 informs them that he knows of a way to send Grodd to a place on Earth 2 where he will be in good company.
So - especially given that Grodd clearly trusted Caitlin - couldn't they just have had Caitlin explain their plan to Grodd instead of trying to trick him and then violently/forcibly coercing him into the singularity without explaining anything to him? I mean... Grodd was pretty darn intelligent, and clearly capable of reasoning (and of listening when other people tried to reason with him, as Caitlin did).
So why was it necessary to use trickery and violence to get him through the singularity instead of fully explaining the situation right off the bat to see whether he would cooperate more peacefully before they resorted to violence?