You bring up some good points. Mainly that teaching you to work on your car, your house, or cook is highly specific to your particular environment. Maybe that's an example of the missing killer app for XR.
OTOH these also sound like things a remote teacher could help you with if they could talk to you in an earpiece provided they could immerse themselves in your environment. So the remote teacher would be wearing the AR headset. But now maybe you'd need a robot avatar in your kitchen.
Just brainstorming here but these might be business opportunities.
Indeed, I have personally tried CozyMeals, which appears to be the prominent online platform for remote cooking instruction that you mentioned. They provide virtual live cooking classes as well as private 1-on-1 sessions. According to a reviewer's feedback on the live cooking class, it is advisable to have all the ingredients prepped, measured, and ready before the class begins, as the instructor progresses swiftly through each preparation step. While it is possible to ask questions, the overall concept remains similar: you observe them, but they are not observing you, which falls short of the guided instructions I previously mentioned. Opting for their private 1-on-1 cooking class, which costs approximately $300, allows you to simply watch as they handle all the prep work and cooking.
OTOH these also sound like things a remote teacher could help you with if they could talk to you in an earpiece provided they could immerse themselves in your environment. So the remote teacher would be wearing the AR headset. But now maybe you'd need a robot avatar in your kitchen.
Just brainstorming here but these might be business opportunities.