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.