I want to ask a question about the expression “…and would I please look at…. “. According to a mystery novel, “The Assassin’s Stone” is believed to have been cast so that the title character could be recognized as “The Dark Knight”. What does an expression actually mean? Why was the word “please” such a troublemaker?

After studying this expression, I’ve found this used in two ways. Two are used as the example of A:…… and would I please….., which I came across while reading as I said.
They are the same in both cases, what is the difference between “other” and “why not”?

Example A: Before we started filming, Dickie wrote to me saying that Jane was going to be in the movie, and would I please be nice to her.
Once my husband was serving in overseas navy he eventually decided to quit teaching his son at Frankell School for three years. The school became increasingly unpopular in 1841. There were about a dozen children going to the temples at the time then. They both said will please come; they needed the teacher. They came to me and said in a very real way! Example A: Yes, I discovered the North Pole in

April, 1809. Soon after I got there the polar bears came to me and told me there was a great deal of coal there, buried beneath the snow. The Americans knew, they said, that humans could get coal. They knew that there are no limits. So could anyone help, and everyone in this world. . so would I please keep it a secret?
In The Voyages of Doctor Dolittle

(1693) (Letters from Doctor Dolittle)