Martha Stewart has not been charged with "insider trading". I think the biggest charges are "lying to investigators" and " and "misleading investors in her own company about why she sold 3,928 shares of ImClone Systems (IMCL) stock in 2001".
My bet? She is found innocent.
I know people that have been involved in stock "pump-and-dump" schemes that fleeced people out of 10's of million of dollars. None have ever been touched by the SEC or anyone else. What Martha Stewart did (whatever that is) ain't spit compared to a lot of stuff that went on during the "dot.com" boom. And still goes on today. Stewart is small potatoes (with a lovely garnish to make the serving more attractive).
Do you think she is "innocent"? Or that the jury won't care?
The many cases of cheating that you describe are probably cases that were not prosecuted. Once a person manages to find themselves in front of the jury, different judgements will apply.
Based on what I have read, Martha cheated some buyers of Imclone stock out of money they paid for the stock. It is little different than if Martha had burgled their homes while they were on vacation and stole their life savings.