Purely from a structural view - favoritism and who has the better position.
When you think about who sinned and their punishment, you start to see a pattern. This doesn't cover all instances but it is telling.
If you murder, fornicate and disobey but are a king or other notable, you probably get away with your life intact. In fact, others may suffer for your sinning while you get forgiven.
However, if you impinge on any priestly duties or offices, you are toast.
King David, the one beloved by the WT, is a notable example. From having sex with Bathsheba, killing her husband, hiding it, having numerous wives and illegally counting the people - David escaped with his life and was forgiven. In the mean time, the child born to him and Bathsheba, well he was killed by God. After David did the sinning in counting the people - the nation of Israel lost thousands of people to the plague.
Then there was Manasseh. Burned his children up and got the nation to follow suit. Sure God threw him in prison as punishment, but then he forgave him when he cried.
King Solomon - hundreds of wives and concubines and war chariots. Started worshiping other Gods but died an old man.
Now for a few examples of what happens when you try to encroach on priestly things.
King Saul - he did some impulsive things but what got him into big trouble was taking the place of a priest/prophet and offering up an offering. Holy spirit taken away and eventually lost his life. His son, a loyal servant lost his life at the same time. Because he was a king, that got him a little more time than ....
Uzzah. Made the mistake of touching the Ark of the Covenant. That was only for one of the Levites or Priests to do. Instant death.
The Famous Korah and associates. Wanted to offer up incense. They certainly got toasted.
Achan who stole spoil from the fall of Jericho. Basically he stole from God (which is also like stealing from the religious leaders) Not only did he die, but his family and animals.
Ananias and his wife. Didn't give it all (to God and religious rulers) and lied about it. Instant death.
What the bible really teaches is - people put in position of authority from the religious leaders, can get away with a lot of things and still remain in power. You can include the very rich in that too because they will give money to the religious leaders. But try to do what only the priests/leaders have given to themselves, you will pay the ultimate.
Elders can have their dirty secrets and be forgiven - the GB can "kill" anyone that doesn't agree with what they teach or anyone that dares to suggest their way is wrong.
Such a book.