well imagine you have seats that arent adr apprioved. theyere absolutely shitty quality

youre in a crash, and the seat jsut snaps. no suport what so ever, your body is jsut gonna slip out of the seat belt, and get fucked up

its not jsut the seats, they need to be engineered to ensure the rails are fine. what happens if the rails are fucked? youre in a crash and the entire seat comes off the floor, and you get sent into the steering wheel/dash/windscreen

its the little details that are important not jsut the big obvious shit