A channeler asks: “Is the reason the more than 90% of “channelers” who are corrupted are not considered as doing true channeling because they were just hijacked by interlopers telepathically, and did not need a pre-birth arrangement to achieve that capability? Is that why so many (relatively speaking) can do that now?”

This is quite correct. These people are not channeling at all. They wanted to connect with something intuitively beyond themselves and reached out with their nonlocal consciousness. That was noticed by the interlopers who reached out to them in return to do a handshake, so to speak, and announce their presence in answer to the call, and thus an acquaintanceship and then a seeming friendship was fostered that involved telepathic intrusion in the minds of these people without true channeling taking place, so it was a corruption and a manipulation from the outset. Given that these people do not have Creator’s translator on board, they will not be able to channel divine-level beings at all, but the imposters they are receiving messages from can easily carry out such a deception and keep them fooled that they are talking to an archangel or ascended master, for example, or even God.