Who would want to rely on anything else? it boggles my mind.
But I also those who teach such things have also been deceived.
To them it's the truth.
Now I have to be honest here I do not think they are genuinely out to deceive.
I think they have a genuine desire to see people saved.
The majority are not or for personal gain
2 Peter 2:1-3
Chapter 2
Destructive Doctrines
1 But there were also false prophets among the people, even as there will be false teachers among you, who will secretly bring in destructive heresies, even denying the Lord who bought them, and bring on themselves swift destruction. 2 And many will follow their destructive ways, because of whom the way of truth will be blasphemed. 3 By covetousness they will exploit you with deceptive words; for a long time their judgment has not been idle, and their destruction does not slumber.
If a person is not out for personal gain then the issue is not to deceive but deception.
Let's be honest, how many of us have preached in the past what we thought was the truth but now realise it wasn't the truth?