Oh, that's the only way to write a good paper - first you write 1.5x pages to figure out what you want to say, and then, with this knowledge, you replace entite confusing paragraphs with short sentences focused on exactly that. When i don't know how to express an idea, i ask myself "-so what idea are you trying to communicate? -well, that XYZ holds -if so, just go ahead write literally that!"

FWIW I think this is exactly the opposite of what the OP was trying to say. I think the OP meant that they often wish authors had used more space to explain their ideas, because that would immediately make them more accessible.

And I must agree. I often feel papers are written with an extra 20% over the page budget, then condensed in the last minute to fit the constraints, which hurts the exposition.

It's a great way to write fiction too. But only if you're not marrying to what you've written.