Porn by itself is mostly made just to be consumed, and as such is very often not memorable - off the top of their head, does anyone remember the titles and content of the porn movies he watches? Or the videos he watches on the pornhub du jour? I bet it's quite rare.
Now, latch characters to a story, and a story to a sex scene - that makes it more memorable, and more enjoyable in general, I'd argue. When we'll have our next sexy interaction with Bronwen, it will be built also on the cut-man part of the story.
All in all, a gonzo-style VN (or movie) is quickly forgotten, at least to me: it's instant gratification. While the games that rely more heavily on the "novel" part of the VN are usually the better ones. Does it make them slower to produce? Absolutely. Is it worth it? To me, yes; and I hope others agree.
