I'll argue in this day and age, that any founder/C-level person who has "created" billions in value, no matter how much of a paper tiger it is, will almost always get another shot. If SBF or Elizabeth Holmes weren't physically in prison, I bet they'd be able to get investment for whatever their next idea is.
Neumann and Holmes and SBF lost their benefactors money.
The claim is that investors are interested in executives who they perceive to have created billions in value, and that's analogous to how NFL teams are interested in people who run fast.
NFL teams are interested in players that can actually run fast, not players that can say they do, but are found to be lying and it turns out they cannot run fast causing the team to lose.
Investors are interested in people they can use to make money. The latter are easier to use, but the former will suffice. It just depends on when you sell.
I think the business of running a scam or a fraudulent company is quite different to an actual business.
Now? Yes for Kenneth Lay (assuming he was still alive and/or not hiding on a desert island under a new identity if I put on my tin foil hat)... Madoff, probably not.
AND ... post the WeWork debacle, Neumann has once again succeeded in raising a massive investment.
There is bound to be a few people who have a soft spot and will give him money again .