As the creator of the thread that motivated your post, I'd like to chime in.
When I first heard of the idea --- especially with DSLR scanning --- I thought it was really absurd. So you grab a film camera cause you don't want to shoot digital, and then grab your digital camera to take a photo of your photo. That's bananas!
Yet, that's what I am currently doing with color film.

I can tell you why I'm doing it:
(1) Part of it is idle curiosity and novelty. --- The concept is still weird and new to me.
(2) Part of it is that
the experience is totally different:
"Yes"... in theory I could take digital photos and use software to emulate the look of any film.
But I don't want to do that.
Doing this kind of post-processing well requires effort, and requires skill that I neither have nor am interested in acquiring. I do not want to sit at a computer fiddling with app settings. I already sit at computer all day. One of the reasons I moved away from digital photography was that so much of it seemed to be about taking a zillion shots with reckless abandon, then hunching over a screen to painstakingly fiddle with knobs and dials to tune the image.
OMG! It made me want to tear my hair out!
I want to get out. I want to be up and about, walk around town, and when I get home I want to use my hands, pour chemistry in a tank, whoosh liquids in a tray, and just basically avoid the computer. Getting sunlight, and just the physicality of the whole process is both relaxing, and good for my mental health.
Film already looks like film. I am willing to hold my hose and do a small amount of digital editing to convert negatives into digital positives, but I very much want the film itself to play a large role in the final product, without a huge amount of editing. You can bet that if RA4 was easier and I has equipped to do it, I'd be doing that instead of digital scans. The digital scans are a compromise between what I'd like to do ideally and what I feel I can attain realistically.