Well, I'd say I was more on the power user side of things. I'd definitely use a more automated STEP install, as I am prone to fatigue when installing mods for hours and tend to make errors. Then I make everything worse trying to fix those errors :)
But I've always used STEP as a baseline modded Skyrim, so getting that baseline up and running faster would have been a big convenience. I can totally understand you not wanting to invest the time though.
As for whether people learn a lot about modding when following STEP: I'm not so sure. Your guide may be a bit too well crafted for that :)
I do not think that automation takes something away though, the same way STEP did not take anything away when I didn't know what all the options in all the fomods of my modlist did. That is ultimately the conservative argument: I was having fun having to do it, and so should you son! But I think easier, more convenient tools are a good thing. The interested people will still dive deeper, the ignorant ones already found ways to not care. New tools is generally a good way to build a foundation out of accumulated knowledge. If you actually want to invest your free time in building said foundation is an entirely different beast, and being passive-aggressive about your views on modding in that context seems inappropriate to me.
I'm extremely tired, seeing that the discussion was a little tense at times I hope I didn't stir anything up. Even thinking about having the time to install mods again will be a long way in the future for me, so I have no investment one way or the other :)