I don’t know where I said that, but I’ve typed lots of stuff on here so I don’t doubt I said that!
I wouldn’t read too much into what I did as a teenager. I did pretty much exclusively random jamming in my room and almost never methodical practice in the sense of playing an exercise a million times at slow-ish speeds to master it. Of course I * tried * that, because you were supposed to. I tried it on descending fours type phrases, all picked, across the strings, because I thought that’s what Yngwie was doing. But it was so incredibly boring to me and the lack of results was an instant downer. I couldn’t bring myself to keep doing it, and always felt guilty about that. So I would basically put on “Unchained” really loud and rock out.
Of course, a lot of that type of random jamming ends up being repetitive. All I knew the box position licks and a few Yngwie type scale fingerings. So that in itself is repetive practice of a sort. But I’m not sure if that’s really what is being asked about here.
Yes I slowed down phrases to figure out what they were. At some point in high school I could do the “Hot For Teacher” solo pretty much note for note, or as best I could tell from transcribing it. But that’s only because it was working. I didn’t find that stuff hard, so what I thought of as “real practice” wasn’t necessary.
Anyway I assume that’s not really what people are asking about when they post these kinds of questions. I think the bigger picture is still very simple. When it’s motor learning / motion acquisition, go fast first, and slow down a tiny bit to try and get more notes clean and figure out and/or become conscious of what the motion really is.