- Aikido is obsolete today. It was designed to protect yourself from samurai warriors. There are no samurai today. FALSE.
Unless my history is wrong, there were no samurai when Aikido was born, either. Therefore, it was never designed to protect anyone from any warrior class. It was designed to use an opponent's momentum and balance, and to combine the elements of Aiki and Jujitsu.
- It is not street realistic. The moves are too fixed, unrealistic, unpractical. TRUE and FALSE.
In the beginning, the moves are very fixed, unrealistic, and impractical. The concept in the beginning is to teach concepts and ideas, and not so much get into realism. That is because in reality, an opportunity to use a technique might present itself, but two things easily happen: the beginner goes out looking for the technique, and second, the opponent is usually smarter and can muscle his way out. In both cases, an experienced Aikido-ka is patient and waits for the technique to present itself and never to go looking for one; and also, the experienced Aikido-ka trains to alter a technique into something else. Such cannot be taught to beginners, it must be experienced and taught over many years.
- It is a highly esoteric internal system, and in order to become an efficient Aikido fighter (in the dojo and on the street) you have to dedicate your whole life to practicing it, like a religion. TRUE and FALSE.
This is a categorical statement, so in this regard, it's technically false. Because more mainstream Aikido (Aikikai, Yoshinkan, Iwama, a few others) this is NOT the case. As to internal/external, I'm not sure what that means: many people seem to have their own idea what internal/external means, and by anyone's standards, all styles are both internal and external. So I abstain from voting on this concept, since I don't have my own definition. You do practice Aikido for life, or you ought to. You ought to practice any style for life. For this reason, there is no reason to jump in to advanced techniques. Aikido's culture - not style - demands patience, and it will take a long time to become proficient and comfortable with the results.
There are several other myths of Aikido that's often spouted, like that it requires compliance. This isn't true except for beginners. Advanced students are smart enough to know that Aikido works when the opponent is committed and intends to do real harm. This is but one of many reasons Aikido doesn't work well in the ring: there just isn't the intention - the mindset - that fighting on the street demands.
Aikido is not a sport, it is pure self-defense. It is a graft of Aiki (which can be applied to any martial art) and Jujitsu. Much of what you see in Aikido - like the joint locks and throws - that isn't Aikido. It's the drawing and harmonizing - that's Aikido. The joint locks and throws are seen in most styles. Very few outwardly employ true "aiki".
Finding a good instructor is hard, but it is the key to understanding Aikido. If you can't find a good instructor, then don't waste your time. This advice applies to any style, really.