I think it is largely because consciousness is so important to people that it is hard to think straight about it, and about anything tied to it. Similarly, the typical person loves Mom, and if you say bad things about Mom then they'll have a hard time thinking straight, and so it will be hard for them to dispassionately evaluate statements about Mom. But what this means is that if someone wants to think straight about something, then it's dangerous to tie it to Mom. Or to consciousness.