[Sentai]

Because Masked Rider made no sense, had absolutely no budget, and had ratings so low you'd have to build your own coal mine to see them. It used stock footage. Which in itself is fine, MMPR did it all the time. Still does. But the footage they used made no sense what so ever (Not that him magically getting more power from water made sense in the original RX black anyway). And Furbus. The answer to why Masked Rider never worked is always Furbus. And those talking cars he barely ever used, yet almost every episode had long boring conversations with that went no where.