Because the downsides that exist for other companies simply do not exist for this tier of rich companies. Examples:

- product liability

- negligence (civil or criminal)

- Computer Fraud & Abuse Act (requires intent, which after N "accidents" seems like a jury should at least evaluate whether intent is present as understood in a courtroom. Hard to blame "surprise" after the Nth "accidental" breakout.)

The bottom line is that if you or I trained a local model and it did any of this stuff, we would experience Consequences. ("Don't try this at home!") But an artifact of our unequal legal regime is that big rich companies generally do not and thus brazenly touting their immunity is part of their business strategy.