Re: Aikido in a street situation
No, that isn't what I'm saying. First, to be clear on terms, combat implies a military engagement to me, while what you are describing is a self-defense event. That said, the Marine Corps Martial Arts Program is somewhat based on aikido and Richard Heckler-Strozzi was instrumental in the program design. I currently train with a number of active duty Marines and they come to us as beginners who are very comfortable with basic technique and falling.
What I said and meant was that aikido would probably not be the best MA for the very narrow scenario you described, and secondly there is no perfect martial art for every scenario. Lastly I mentioned yoseikan budo as the most comprehensive art that I'm familiar with as it has striking, throwing, pins, weapons work and defense, and grappling as part of the formal curriculum. I doubt that it would work in every possible scenario either.
In a street situation you probably aren't going to face a skilled and trained martial artist. You will likely face a drunken lout or even an experienced street brawler. Aikido will work as well as most arts in those circumstances, better than some and not as well as others. It will not be perfect for every situation, any more than the katana was then or the firearm is today.
I hope that clears up any misunderstanding there may have been.