No, they don't know anything. I'm not sure how they came to draft this email the way it was sent. Maybe wishful thinking, maybe a subordinate mis-understood their boss when told to compose the email. Maybe the guy who wrote the email has a brother-in-law who's cousin was former roommates with the Premier's son and thinks he has inside information.
We've all heard of the (politically incorrectly named) game of Chinese Whispers that we played as kids. Sitting in a big circle, one kid would whisper a statement, and it gets passed around the circle. By the time it returns to the start of the circle, the statement is completely and totally different. It's human nature - errors or exaggerations typically accumulate in the retellings of any story. This effect is hugely amplified on such a small rock like Grand Cayman, or on a forum like Scubaboard.
Most citizens of the United States will never encounter a Senator or Congressman in the general public outside of some sort of political function. Here, you can and do meet members of Parliament, Cabinet Ministers, and the Premier out and about - at the store, in a restaurant, or walking their dog. Everyone here has a cousin or a friend who works in government, or who knows the Deputy Governor's wife, or plays rugby with a Minister's son. Everyone claims to have some sort of inside information. A very small percentage might actually have some accurate info. 99% have unsubstantiated and inaccurate rumors, which get repeated, twisted around, repeated again, and then picked up by the press and reporters as fact. Then others report this to their customers. Cumulative error compounds inaccuracies as the story spread from one person to the next.
I'm not saying that's what happened here. For all I know the person who wrote the Hertz email is a minister's wife and has full access to the hidden "plans." More likely it was one of the other reasons I wrote at the top of this post. For the better part of a year I watched as people reported inaccurate fact after fact about the Government's reopening plans. In all that time, they never actually had any reopening plans, something recently revealed by our Premier Mr Panton. This proved that anyone who "had the inside scoop" was full of BS. While Government now have a plan they are working on, they still don't have an actual opening date yet as the situation is dynamic and there are too many unknown variables to determine this presently.
Eventually, when enough people make guesses as to the reopening, someone will get it right. ;-)
Tony