Telling people that Jesus will improve their life on earth, is playing on people’s pride and greed. When life doesn’t go as planned, they get a cancer diagnosis, or if they are ridiculed for their faith, they will become disillusioned with God.
"I asked him what would happen if Jesus wasn't there? He said he would face the fire. "So what is the only reason you wouldn't go to hell?". He replied "Because Jesus blocked my hell punishment". I asked him if he believed that, and he said "Yes". "