Not Google-specific, but access to production servers in the industry is heavily restricted to server ops roles so the majority of employees, even high ranking ones, do not have unfettered server/db access.

High ranking Google SRE's, on the other hand, can view your personal information as their job is to run and maintain the production servers where your personal information lives. I don't know what portion of Google employees are SREs but I would guess much less than 5 percent.

I don't agree that Google is a major offender as far as negligent or malicious data/privacy leaks. Their security seems fairly top-notch, especially considering the context of new hacks/leaks that come out constantly from other companies.