Gmail users (correctly and reasonably) do not expect the "gmail team" to read their emails, except using glass-breaking incident response privileges that leave audit trails and trigger review. Users expect that email is private. Anyway, both Google's privacy policy and American jurisprudence segregate things like emails, voice calls, and video calls into a separate "communications" category, while Google's privacy policy treats Google Docs as "other content you create", even though the difference seems immaterial if you know how these systems work.

Google originally declared that they read all emails. That was semi-changed with the Workspace rollout but there is nothing preventing them from reverting to the old policy. They already do it anyway for reminders extracted from email.