A major misconception
It is quite true that you cannot teach beginners about Ultimate Truth. But this does not mean you should then fill them with lies! All religions are guilty of this most terrible of crimes.
A person may not have a strong intellect, but this does not justify swamping them with a million categories and ritual practices, which only creates in them the kind of mind that hates truth. Instead one must encourage and awaken their enquiring mind, their intelligence and their reason.
How then, does one awaken reason in another? One gives them the tools to take apart all their categories; one doesn't give them more of the same! One stimulates, teases, coaxes, and rewards. It is not as simple as giving people a set of rules to live by, or a script to follow.