[headcanon]

I think if you're asking those questions then you're ahead of where 99% of people are thinking about when they think about "AI" (as are most of the folks on this site by selection bias). I think as these tools mature and get included in more standard tools like Adobe is doing then the distinction will blur enough that there will be some new criteria. And at that point maybe people won't care enough to have that distinction. But right now, people care a lot and its (mostly) obvious enough, hence the policy.