Earlier quoted context omitted.
When did "there was a vulnerability" become "there was a breach" ? I don't understand why it's being reported as a breach.
Because breaches come from public vulnerabilities, unless you can prove there was no breach, you should treat it as a breach. This is common information security practice. Google are unable to prove there was no breach because they didn't keep sufficient logs, which is also not acceptable in modern security practice.
No it isn't.
If every vulnerability in every product turned into a "We've been breached" disclosure the industry would be a disaster.
Yeah, they didn't keep sufficient logs and they fucked up really badly there. Still silly to call it a breach.