Because they want to go public and get as much money as possible. They won’t be able to do that unless they demonstrate that they can monetise their platform.

Things will go back to a new normal with a lot more users. Some will remain others will not. Eventually the ecosystem will mature, new apps will be created and more people will move over.

I have a feeling that these tools make sense under specific circumstances. For example, a doctor could use AR to help them diagnose an issue or operate. Similarly an operator of specialised equipment could use it to enhance their perception. Pilots in fighter jets use something like this already, the do not have a screen in the cockpit, they use their helmet. But those tools are not consumer oriented, they are business oriented and Apple does not have a footprint there.