We already gave everyone a zero-day button. Zero days are being discovered for Windows, macOS and Linux on a weekly or sometimes daily basis.
The result has been more proactive and informed OS security with a higher turnover rate for discovering, disclosing and patching new bugs. The market for creating zero-days has cratered and left talented malware developers without a cornered market. Frontier, uncensored LLMs like GLM 5.2 are proving instrumental in responding to cutting-edge adversaries.
Your theory does not hold up in practice and cannot be meaningfully extrapolated to more advanced AI.
Journalists get bonesawed because of an abuse of the concentration of power, which is what you're directly advocating for.