Oculus is accessible by targeting itself as a fun gadget. You buy it to play immersive games when you're at home alone, bored. It's also affordable and that is extremely important. You won't feel nearly as bad dropping a wad of cash on this if it turns out to be a dud.
Apple's product, on the other hand, is extremely wonky. Who is this thing actually for? Based on the demos, it just looks like a second screen for my phone. It's also outrageously expensive. So Apple is asking me to seriously buy into the ecosystem and have confidence that this will be an important device in my collection.
I don't know, to me this isn't like any previous Apple take on a well defined market. In fact, this is Apple's take on a very undefined market with an unknown trajectory. It kind of feels more like when Apple went off the beaten path and added a touch bar to the MacBook Pro. It was an interesting idea and a lot of very long man hours went into making it work, but at what cost? In the end, it turns out, people just wanted simple tactile keys.