IF, God doesn't exist at all. Then, all great persons of the history like: Krishna, Muhammad, Jesus, Buddha, Gurus etc. were doing drama ? What make you think, they were NOT honest with what they said and taught to people ?
First of all, who is making that claim, they were all lying / being dishonest?
I'm guessing it's nobody and it's something you made up or misunderstood.
There's more then just being dishonest as a reason for why inaccurate / false stories see the light of day.
They could also just be mistaken for whatever reason.
As for me, I usually operate from the (perhaps naive) position that people generally are sincere.
But sincere people can be wrong as well. Somebody can honestly believe something, while being incorrect in that belief.
And there are a lot of ways on how this can happen, especially when it comes to these types of claims.
People are honestly mistaken all the time for a wide variety of reasons, ranging from simply misinterpreting certain events to outright hallucinations. It's not exactly rare... 2 in 100 people for example, will be dealing with psychotic style episodes or symptoms at some point in their life.
Off course, people lie as well. Also for a wide variety of reasons. To be interesting, to be the center of attention, to gain some type of benefit from it, to gather a following,... there are lots of plausible motivations.
Here's the thing though....
Claims about supernatural things are extremely extra-ordinary. And none of them have extra-ordinary evidence to back them up. Or any evidence at all, for that matter.
So on the one hand, we have
countless of examples and precedents of people being mistaken or lying.
On the other hand, we have
zero of examples of confirmed supernatural activity of any kind.
Apply occam's razor and what do you get?