I have worked in healthcare related systems before that needs to be HIPAA compliant, even for those systems public disclosure of a vulnerability is not a requir

I have worked in healthcare related systems before that needs to be HIPAA compliant, even for those systems public disclosure of a vulnerability is not a requirement. No software is bug free, and many seemingly benign bugs are security vulnerabilities. Try and name one company that reports all their bugs (security/non security) discovered internally.