Some techniques remain a mystery to me
Still some Aikido techniques continue to be a mystery to me and seem only applicable against a crazy guy charging at you giving you full committal. For example, certain versions of kokyu-ho seem incredibly unrealistic unless the guy continued to hold your hand throughout the movement. This is obviously ridiculous in a real life situation.
When you look at those techniques, especially ones where uke grabs a wrist and keeps holding it for no apparent reason, think of what the fight would be like if you were holding a weapon, or if they had a weapon. We train weapons regularly and I've found that many of the techniques reflect a situation in which either nage or uke is attempting to retain and attack with a weapon.