Off course it will work in some respect depending on how it's trained etc... until you come up against somebody with the goods, like Ueshiba did with Takeda, and couldn't move him, never mind perform a technique etc
Minor point: Ueshiba wasn't doing Aikido when he came across Takeda. Well, actually, a major fact.
Later, when confident in his OWN Aikido he would demonstrate on anyone from sumo to whatever. Including anyone with ip/is or whatever. It didn't matter. He was on a different level.