If you read some of the other threads on here, especially the anonymous ones, I think you'll find no shortage of students who have become disappointed upon discovery that their sensei has clay feet.
In Christianity, I think the term for placing one's faith in, and blindly following, someone other than God is "idolatry" and it is NOT recommended. I'm not sure what the Buddhist position is - this would be useful to know, since you are concerned with attachment and illusion.
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