I'm not sure I fully agree. Someone who really knows their topic well and is skilled at explaining it can often explain in simple terms with relatively few word

I'm not sure I fully agree. Someone who really knows their topic well and is skilled at explaining it can often explain in simple terms with relatively few words. Many papers on the other hand seem be written with filler either to put on airs or to make the paper appear to have more info than is actually there. I know this is not true for all papers or topics but it does seem common enough that I run into it frequently.