Even before the GDPR, Google had to contend with the NSA / GCHQ illicit access events and the China hack. They had plenty of experience to suggest to them that

Even before the GDPR, Google had to contend with the NSA / GCHQ illicit access events and the China hack. They had plenty of experience to suggest to them that keeping highly-detailed logs around indefinitely could do more harm to their users than good.