You can, but with important caveats. Google does not penalize AI-created content per se, but it does penalize low-quality content, whether written by a human or a machine. The question is not "who wrote it", it is "is the content useful, accurate and original?".
The risks of using generative AI for content without supervision are: incorrect information (hallucinations), a generic and impersonal tone, lack of data and examples specific to your industry, content duplication (the AI may generate text similar to what already exists) and the absence of a brand voice.
The most effective approach is to use AI as a production assistant, not as a replacement. The AI generates drafts and outlines that a human expert reviews, enriches with real data, adjusts for tone and fact-checks. This combination keeps productivity high without sacrificing quality. At Netlinks, all client content goes through expert review, even when the initial structure uses AI as support.