Why are JW quotes always so old?

There's a new (to me at least) article on the website about divorce and "is it the answer".

In one of the sub articles they reference a couple books that basically assert that divorce fucks up your children and that's why you shouldn't divorce (even if you're being abused and you fight every single day). The thing is, the book that they reference and specific refer to as "recent" literature was published in 2000 or 2001.

The article also conveniently ignores all the people who wish their parents would have divorced when they find out one was abusing the other for many years or abusing the kids too.

Like it's pretty insidious to me that they would basically try to say "don't divorce because your kids might feel bad about it" and ignore the fact that most people can reason on things later on in adulthood.

Anyways, it got me thinking, every time I read a quote or look up a book it's always one that was published at least twenty years ago. When I was in university, all of our papers would be rejected if our citations were older than ten years (and in some courses older than five).

Of course, true facts don't change over time, but data is constantly being added. 20 years is a pretty fucking long time to hang their hat on a point that may no longer be considered true (or may have a more nuanced view).

Even their quotes about how their Bible translation is fantastic are actually misattributed to the 2013 bible. The reality is most of their "external praise" is referencing older version of the NWT, not anything current and the praise came decades ago.

I get the feeling that there is some kind of rule in place that prevents them from using, or even looking into, new research related to any given topic.

Anybody else notice these shenanigans?

Edit:

It's also ironic that many of the quotes in this article are from women such as Barbara Dafoe, Maggie Gallagher, or Mary Ann Pietzker for this article series as well as other articles. They literally say women are not fit to teach, yet a lot of the points in their literature is built on quotes from women. Although it's often misquoted or misrepresented, how do they reconcile this with their ideology that women can't teach?