No it isn't. It doesn't help in the least bit.
Ueshiba...your arts founder, like thousands of high level budo people before him..all.....all......all...
pointed to solo training to develop Internal strength.
For a group of folk who make claims of being open minded-modern Aikido-ka's interest in re-defining things they don't understand and cannot do to fit what THEY do understand and can do doesn't help anyone grow.
oooohhh, 3 fingers fingers pointing back at you again.
(about the open minded bit)
I disagree with what you wrote above. It has helped me. And here is how. By training in a semi traditional Aikido dojo I have learned quite a bit about how people move, how it feels to move with them and how it feels to get them to move differently.
It has nothing to do with raw power. This is one of the aspects that makes Aikido as I practice it good for women and smaller men.