586 is interpretation and may be liked like the theory of evolution ( not saying that the comparison is congruent) but 539 is a historical fact. There are 2 schools of thought but wt 607 based on Bible interpretation is also valid. And there are solid reasons to conclude that the land lay desolate 70 years to pay back it’s Sabbaths. Archeology has not debunked wt 607. It stands same as creation. There is a great thread on this forum where “Scholar”argues against the interpretation of the stele that suggest 586. Wt has published as sbf highlights that wt is fallible but that doesn’t mean wt is equivocating on 607. We’ll see what happens sooner or latter.
My sympathy to the loved ones of COJ.