Most of the fraud you are talking about also wouldn’t have the explicit benefit directly to the founders the way it did with FTX. SBF took money that wasn’t his and spent it on private planes and luxury apartments and hundred million dollar investments _in his name_.
The average startup founder who is trying to close a sale by exaggerating their business a little bit is not going to have that kind of clear gain, because most founders do not use their companies as piggy banks.