Evidently some folks have very little real life experience.
Flowery dances and the like , may be technically scientific , a ninjutsu claw may be a potent weapon in the hands of an experienced practitioner.
Now , lets say we take a real life scenario. A car jacking or a shootout inside a public shopping mall. Can we assume that an ordinary person takes a claw with him to every damn place he goes , or that an "intricately scientific" flowery dance is the first thing that comes to his mind when he sees his young daughter held hostage by an armed thug ?
This is the basic difference between a modern fighting system and traditional forms ---practicality. In modern systems you have no rules , no disqualifications , no rings ( as in typical MMA contests ) . Nothing matters except personal safety within the ambit of the law - which is what distinguishes Krav Maga , Systema , U.S Hand to Hand etc from Traditional forms.
Those with a bit of deeper knowledge will understand that Krav Maga ( for example) incorporates many practical moves from eg Jujitsu ( Groundfighting based) , Taek wondo ( kick defense) , elbow strikes are taken from Muay Thai and so on and so forth.
In short all practical moves are taken and anything unpracticeable discarded which happens to be Flowery dances , exotic kicks ( like 360 degree spin kicks , flying roundhouses etc.) . Such moves look cool on TV but are a no goer in a practical situation.
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The SC : Nice information Mr. Philosopher/Theorist but I would really urge you to step out of your ring into the streets. I 'm sure you will find life drastically different there.