In reply to Bastian.

Paragraphs are blocks that actually make sense to separate.

No, Otto, they don't. You've just made that up. A paragraph is a paragraph. That is quite different from a block. Take a look at some professional writing software and you will see just how wrong you are.

As long as typing and editing normally disconnects and reconnects them as needed, then it’s kind of irrelevant as to how separate they are internally.

That's complete BS. Which you'd know if you'd published hundreds of thousands of words using professional writing software. But you haven't.

No professional writing software pre-determines the size of a block. It would just keep interrupting the flow for a writer to have to think about creating a new block all the time. Instead, the size of each block always gets determined by the writer as s/he goes along.

The hubris of those involved in Gutenberg is really quite astounding. You would think they might have taken a look at how professional writing software works. But they haven't, and so they make bad design decisions and utterly absurd assertions.

Oh, and just in case anyone would like to see what I mean, check out the following for a few examples. There are many others:
Scrivener
LyX
Sigil
Zim
yWriter