It’s not discoverability, it’s giving songs a chance that don’t sound appealing at first, because skipping them would be too much of a hassle. Songs can grow on you after listening to them a couple of times even if you didn’t like them initially. When using streaming services, that trajectory rarely happens unless you specifically decide to always listen to the whole album, multiple
times.
This is exactly what I meant. If a song doesn't immediately tickle my fancy on spotify, I hit next. With a vinyl, I just leave it on and oftentimes I end up liking it.