Hope that was just tongue in cheek..........
The title of the OP suggests that a person COULD go through their entire lives just reading the King James Bible and be ok. Is there NOT some truth in that? Not every person in the world reads Greek........then again, not every person in the world reads English as displayed in the King James either.........
Is it good to research other versions? For me it is.........BUT the idea posed in the title remains to have a modicum of truth to it in my opinion.............I don't know how anyone could call it heresy.....