I can forgive the nebulous terms, but that doesn't mean I have to accept them!
The fact is, I don't really know what any of that means. If stakeholders can't define "careless", I don't really see why their opinion matters? VAR is a referee and law-based system - if we want to go back to refereeing based on vibes as was the case 100 years ago we can, but it would require major surgery to the law book to rip most of it out.
A referee in the VAR booth should be looking at the incident, recalling their understanding of law and deciding "Is that obviously at least a careless foul in the PA?". And if the answer is yes (which I now think almost every referee on this thread thinks it is), they should be doing their job and getting involved to make the big call they're employed to make.