Would a question that requires an amount of text to explain be good to send? From Is it appropriate (as a PhD student) to email other researchers asking about some details in their papers?, I get that generally you will get answer if you ask question on their work. But what if your question is tangent to their work, and requires some space to elaborate?
The draft is below:

Dear Prof X
To introduce myself, my name is Y, from country Z. I have read some pages in your book about the connection between [concept A in field 1] and [concept B in field 2]. I wonder what do you think about the connection between [concept C in field 1] and [concept D in field 2]?
[16 lines and 184 words to elaborate the connection. I don't consider this as a wall of text]
I also have a blog article explaining all my observations about the connection between field 1 and field 2. It may take only 5 minutes to read.
Thank you for your reading. Hope you enjoy it.

Some notes:

I haven't read his book enough to say that I know a large portion of it (just skimming it), but I can say that I understand A, B, C, D at least in introductory level.
I don't have any institute, but I think my culture is relevant to field 1, so perhaps it can be a kind of expertise/institute?
I may apply to his school in the future


Related: How do researchers send unsolicited emails asking for feedback on their works?
As a busy person who receives these sorts of emails, my response to email tends to fall into two categories:


I can respond to this right now, and get it out of my queue.
I'm going to need to think about this some, I guess I'll put it off for later... and later turns out to be days, weeks, or months before it surfaces again, if ever.


Unfortunately, your draft email above will most definitely fall into category #2.


"What do you think about..." is an open-ended request for an essay. Is one sentence enough, or a page, or a full scientific paper?
You want the reader to digest 16 lines of technical discussion with an unclear goal of evaluation.
You also want the reader to go read your blog post, which makes me wonder if that's the real point of this.


You've thus got 3 different things you're asking of the reader, none of which actually says what you really want to get out of the interaction.

And that's the real problem: why are you writing to this person?


Do you have an answerable question they can help you with? (i.e., not "what do you think..." but "Does Concept A actually mean that Red Ones Go Faster?")
Do you want to show them your work and see if they think it makes sense?
Do you just want them to be aware that you exist?
Something else?


When you figure out what you most want, focus the email on precisely one thing that can be addressed quickly, and try to keep the whole thing to only 3-4 sentences.  If you can do that, you also will have forced yourself to be clear enough about what you want that a useful answer is much more likely.