genuinely what do you use AR for? I see alot of people saying this same thing. I don't have any VR/AR experience as the frame will be my first VR headset

Not op, but I use it for seeing the joystick + throttle and the "real" instruments in flight simulator.

Virtual boxing with friends (Thrill of the Fight 2). AR allows me to see my room instead of some virtual ring so there's less risk of hitting walls or furniture

It has cameras so you should still be able to see everything, just not in color because the cameras are monochrome.