I think it is bad form to write an article to the general public and assign a date the no one knows what it means. Why speak above everyone’s head. It is better to assign a calendar date range. I am still not sure of even what millennia they are talking about.
It’s a but of a dispute among academic types.
I agree with you, but the prevailing school of thought is to give a proper calendar date is misleading the public at large. And they aren’t wrong, either.