took me about 15 minutes to write it up (did it myself too often...). of course there is the SIG but the problem is, that many people don't have a clean vanilla setup as backup in the first place. They come to this forum after a long way of modding their game without having heard anything about clean saves etc.
Where did you find those instructions (or did you make them )!? I'd very much like to post those on our wiki and of course I like to give credit where it's due.
I myself have a really bad internet connection which makes validating any files by steam really really really annoying (internet mostly dies before it ran the validation). It's fairly easy to manually delete only those files that don't have anything to do with skyrim vanilla and then run a validation as check, whether or not some original files have been lost.
That's exactly what I was thinking of it for. I was actually in that situation after forgetting to make a backup before I threw SKSE and RCRN in, so that helped me get a truly vanilla archive (ultra-compressed down to 6GB for safe keeping :D ). Any better name ideas than "Make Skyrim Vanilla Again" or "How to Clean Skyrim"? I'm not a very creative writer, lol.