Because Divi consists for a large part of “drag & drop” blocks that are standard in the WordPress theme, you can quickly build up a nice page. Do you want to change more? Then you can easily make adjustments per block or even enter “custom CSS”. You can make Divi as flexible as you want.
You would think that the popularity of Divi is a disadvantage. If everyone uses the same theme, then all websites will look alike. This is not the case with Divi. You can really go all the way with Divi. Take a look at the image below, for example. All screenshots you see here are from websites created with Divi.