However, the prosecution did bring charges for both against Holmes, harm caused to patients by Theranos, and the defauding of investors. She was only convicted of defauding investors, by a jury of her peers.
Sunny Balwani was convicted of defrauding patients and Theranos did settle a class-action lawsuit against them.
I do believe the publicity around Holmes in part was about distancing the investors (the list you provided) from any kind of responsibility or PR blowback.
Anyway, the game is rigged, I just think it's important to see how it is rigged. I don't like to shed doubt on jury decisions, it really is the best thing we have. Prosecution motivation can be swayed, defense can be under/over funded, but a jury of your peers, while imperfect, really is the best way to make these decisions.
I also don't know what legally an investor can be held accountable for.
Now he only has the option to let people go for crimes, either by pardoning them or instructing prosecutors to do nothing.
Trump has used both options he has, so the ability to convict people would have been disastrous.
While I agree to the larger point you are making, I am hard pressed to understand what they could have done. Its not like they were not involved at all, there are plethora of accounts of these people receiving reports which just lied. They were blocked from access to the actual equipment for "security reasons" so they couldn't get a third party assessment done. At some point you have to believe your business partner will not outright lie because otherwise how do you do business with them. Life cannot run on cryptographic proofs.