Why does the custom HTML block not preserve the HTML characters?

For example it seems that the plain single-quote character ' (#x27;) is converted to the right ones ’ (#8217;) in the HTML page output. I understand the reason for this in regular Gutenberg blocks, but why does it still need to be done in the custom HTML block? I enable troubleshooting mode and use the Twenty Twenty-One theme and it's still converting.

Here are the different between the input methods:

pParagraph block then converted to html: #8216;/p
Custom HTML block: #8216;
pre class=wp-block-preformattedPreformatted block: '/pre
pre class=wp-block-codecodeCode block: '/code/pre
preClassic block with preformatted style: '/pre

My goal is to preserve the characters so that I can make inputs for Cypher. A piece of JS is in the post to handle this input.

_{FYI: A piece of JS code is needed to use multiple times with different values and function names. How to do it efficiently?}