Very much not the case.
I was on the iPod software team 15 years ago, and let me tell you, we got plenty of detailed feedback from periodic "SJ reviews". My manager (a line manager of a small team) went to those meetings and came back with lots of very specific things we needed to change.
One year (fall 2008) Steve was going on vacation to Italy for a week or two, and asked for a development version of the iPod shuffle we were working on to take with him on the trip. (We were terrified, because it wasn't really ready for that level of scrutiny.) That was at a time when the iPhone 3G and the original iPad were also under development, and yet we got a bunch of feedback on the humble little iPod shuffle when he returned.
He really was in the details, to an astonishing degree, and not just for the headline products, either.
I've yet to hear a story where Jobs was the one who discovered the fix, only stories that he pointed out the things that needed to be fixed.
He's lauded as a visionary, not as an engineer. And all the stories about him are about him pushing others to realize his vision.
Edit: Lots of people seem to disagree with me, but then pointing out how he was an extremely skilled ideas man. Perhaps that term has too much negative connotation for Jobs' visions (ideas) to be associated with?
Not to say ideas guys aren’t prevalent, but for all his faults I would argue that Jobs wasn’t one of them.
I think "ideas guy" doesn't capture this. He had big ideas but also was super particular about details.
(Which doesn't justify being a prick, to be certain)
You can easily identify the wrong thing as the problem then end up trying to hide a symptom instead of fixing the problem. Medicine is notorious for treating symptoms when the underlying problem is usually related to something else like diet or (lack of) exercise.
You can also completely fail to identify an obvious problem such as the games where you end up stuck and having to Google how to progress because the game is poorly designed. This poor design isn't going to be obvious to anybody working on the game every day because they designed and already know the solution but it would come up if somebody else played the game and got stuck.
Realizing that the iPod had to be thinner was a visionary idea. Making the iPod thinner was a technical feat.
One had the idea, the other had the technical ability (even if they had given up before Jobs pushed them harder).