Google's guidance on what it calls scaled content abuse is specific: the violation is not using AI to write, it is publishing content at volume with no meaningful human oversight, added expertise, or original value. A page a human wrote badly and a page an AI wrote unreviewed are treated the same way if both are thin and generic. The safe zone is not about the tool used, it is about whether a knowledgeable person actually improved the draft before it went live.
Your-money-or-your-life topics - health, finances, legal matters, safety - carry the highest cost of an unreviewed AI error and the least tolerance for it in quality evaluations. A subtly wrong dosage figure, an outdated tax bracket, or an incorrect legal deadline is not a stylistic problem, it is a harm-causing error, and these topics should never publish from an AI draft without a subject-matter-qualified human verifying every factual claim line by line, not skimming.
Original research, proprietary data, and first-hand experience claims must originate from humans, full stop. A model cannot have run your survey, tested your product, or interviewed your customer, and any content that claims to have done so while actually being AI-invented is a fabrication that will eventually surface, either through a reader who checks or a competitor who calls it out publicly. This is reputational risk, not just an SEO risk.
Brand voice decisions - the tone in a crisis communication, the wording of an apology, the framing of a sensitive announcement - need a human author making a judgment call informed by context a model does not have: internal politics, legal exposure, how a specific phrase will read to a specific community. AI can draft options here, but a human must choose and take responsibility for the choice.
The durable heuristic across all of these: AI is a force multiplier on existing expertise, not a substitute for it. Teams that use it to make their experts faster consistently outperform teams that use it to avoid needing experts at all, and this gap widens over time as review-light AI content gets caught by evolving quality systems while expert-reviewed AI-assisted content keeps compounding.