My thinking is there's too many industry niches to appeal to in a promotional video. Plus these industry companies know who they are and how they would use this as they are likely already experimenting or using other VR systems like
www.varjo.com and
www.strivr.com. NASA doesn't need 3 minutes of promotional video to be sold on the idea—they already have teams working on AR/VR.
There is a feedback loop Apple is going for—trying to solve the chicken & egg problem when a technology is too early for mass markets. So I think they wanted to be as focused and condense as possible without branching into all the alternate use cases that may color how comfortable an idea the general audience finds it.
Not the best example but when Apple released the Apple Watch, all this design and marketing effort was put into making it a fashion icon, with exotic materials and high prices, magazine covers, model endorsements—but mass markets said,
"no, we want it to be a health and fitness watch that we can also wear to work" and Apple adapted. The watch found its audience so Apple adapted which lead to not only further health and fitness features, but a premium health and fitness watch in the Apple Watch Ultra.
Apple has begun a feedback loop relationship with early adopters, and not going for high sales numbers, which I think is pretty obvious when it's priced as a $3,500 headset—but I swear many Macrumors users (not you) think Apple shipped a dud because mom and dad aren't buying one for Christmas. This is a long-term play.