Chipping in.....
This 'trait' of deceit was something that I noticed from early years of association with witnesses...
It started off as 'avoidance' or twisting of words and reinventing realities...all of which has been mentioned in this thread.
My own husband was not brought up as a JW, but like the OP, he absolutely cannot seem to just 'tell it as it is' - and I don't mean simply embroidering a good story for entertainment value! He chooses avoidance nearly every time, and it can be exhausting as he also has a history of lying about very serious matters.
But I know this is a family trait which developed through a dysfunctional parenting situation...and I should mention, both my husband and his family are relatively 'decent' people. Intensely law-abiding, honest in money matters....but this strange avoidance thing, keeping them 'personally' unattached and a bit of an 'island'....some of the verbal dances they perform are hilarious, if it wasn't also unsettling and uncomfortable π€ - one constantly had to readjust expectations when talking about things with them.
I believe JWs have a similar dysfunctional global 'family' upbringing.
So yes, this odd and unsettling deceptive behaviour is ingrained....and often done with a smile and a hug π
I learnt how to talk this way myself, in their company...after awhile it became second nature to not directly answer questions about the bible, witnesses etc when around the 'outside' world of people. ππ€