I find emergence to be the least reasonable of the 3 main hypotheses I consider, but I still accept that it's possible since I can't disprove it. However, it is illogical to conclude your hypothesis must be true at this stage.
Your comparison proves nothing. It is no different than insisting a radio must be creating the signal it's picking up, because if you poured alcohol or liquid gabapentin all over it, it will no longer be able to play music. I'm sure you realize that if your radio breaks, that doesn't mean the radio signal has disappeared. It is possible our brains are simply interfacing with consciousness rather than inexplicably fabricating it from more than the sum of its parts.
Based on everything science has taught me, it seems far more likely to me that consciousness is not magically created by my brain, but rather one of two things are happening:
My brain is able to interface with a conscious field
Consciousness is a force inherent within the universe, and our brains are able to make use of the force