Full scale aircraft have redundant systems to save pilots lives model aircraft have redundant systems to save our planes lives.

Flying without redundancy is like a fighter pilot without a parashute. 99.5% of the time the parashute will not be used, pilots can spend 20 years and never have to eject. But that one time that they do they are glad the shute was there. I don't care if My battery/connector will handle 100Amps, on giant scale planes for the safety of my plane and the personnell in the area I will run redundant power systems. A reciever is an electronic componet in a volitile environment. Electronic componets fail. The Mean time between failures could be 5000 hours, but I don't want a receiver in my plane that final hour.

Yes one battery, one receiver, one switch, and standard connectors will likely fly a giant scale plane and never have any issues the data shows this to be true. But would you want to fly in a comercial airliner with one battery, one pilot, one high capicity hydralic pump, one radio, one fuel tank, one engine etc..?

Dupilcate or eliminate any single point failure.