Holmes got federal prison time. Neumann did not. Arguably, Holmes did worse. Holmes was about to start selling snake oil, or rather snake oil blood test, which is essentially a medical fraud, although this is not the type of fraud that brought her to she to the prison cell.
Neumann took stupid VC money for a ride. Unethical? Yes. But they giving it to him very willingly. His actions arguably could do more damage, because maybe WeWork bankruptcy can finish off SF commercial real estate market – I don't know how much of their 13 billion lease obligations are in the city. But it's hardly his fault that the system is so brittle.