One of my favorite SJ quotes! I find it hard to believe the poster is opposed to spending time figuring out how your product should work. Maybe he really just means a startup needs to focus early on, and not waste time on inessentials. I actually hope, though, that Apple's success will make good design (in SJ's sense) more common in the tech industry.
Jobs had a major role in how the products at Apple have worked from the start.
I also recall Jobs making interface design references in his Stanford commencement speech about typography, calligraphy, kerning, and typesets. This happened before he started Apple.