The fact that the rule is open for interpretation means that they can effectively shut down malicious actors (i.e those who intentionally misrepresent the degree of AI assistance in writing their code) before they become a problem. It becomes an exercise in judgement instead of a potentially exploitable/loophole-able set of hard and fast rules.
There's no issue with this. This isn't the supreme court. Your income is not on the line. It's a code hosting repository. Go to GitHub if it bothers you.
Only time will tell if this set of values holds up. Personally, I think they will, and that the rules will end up being less strict than people are making them out to be, and that relatively few projects will be removed from the platform.