I think there are techniques that are more pratcical than others. At times, I feel that some of the technqiues I practice are to teach me principles of Aikido rather than direct application readying me for a bar room brawl. On some of Peyton Quinn's tapes, he has a sidekick that apllies Aikido very well to just this situation. Very effective.
I would also agree that the question is about the pointlessness of a certain technique more than can we discover the point and make it effective. There are technqiues that I know I cannot at this stage make work, yet I have felt my Sensei slam me with.
Just stay open and let the point discover you through the practice. There was much I did not understand and there will always be new points to discover. That's the beauty of Aikido.