Anyone choosing 24 FPS with a digital workflow is absolutely doing it intentionally. Part of that may be historical reasons or matching expectations, but it's also a factor in some of the illusion that goes into movies.
Not true in all cases - for example Blu Ray doesn't support 48 FPS which is probably the reason why we never got high frame rate home video releases of The Hobbit and Avatar rather than the directors thinking that we should see those movies in 24 FPS when at home.
I agree in part. I'd like to see movies shot at higher framerates if and only if the filmmaker can actually pull off a good result, but I suspect it isn't always viable.
