Would, could and will.
I voted yes, but agree with you both too.
The question asked if aikido "would" be a positive influence. I saw this as the ability to do good, but not the certainty beyond freewill. Could aikido help anyone? Why not? Does every human being have something to learn from aikido? I think so. Will it or does it always perform miracles? No, unfortunately not.
Aikido may not be the perfect way, still mankind has come up with worse.
If one wanted a great arguement on semantics, one could question if anything that fails to help people even is Aikido.