It looks like you're getting downvoted, but my opinion is that your statement is correct.
Yes, technically, common sense doesn't work because some things written by AI won't be obviously written by AI and some things written by people can appear to be written by AI when it was not.
However, I suspect that medium doesn't actually care if something is written by AI or not. They want to stop the person writing hundreds of garbage articles a day. The person writing a nonstop deluge of poor quality articles sans AI is going to be erroneously banned. The person writing high quality articles 100% powered by AI won't be banned. AI will simply be the justification for culling what they do not want.
Yes, technically, common sense doesn't work because some things written by AI won't be obviously written by AI and some things written by people can appear to be written by AI when it was not.
However, I suspect that medium doesn't actually care if something is written by AI or not. They want to stop the person writing hundreds of garbage articles a day. The person writing a nonstop deluge of poor quality articles sans AI is going to be erroneously banned. The person writing high quality articles 100% powered by AI won't be banned. AI will simply be the justification for culling what they do not want.