I do belive the disorientation is still beneficial for the RP, as even after less serious collisions you would not probably be able to drive away straight up. It adds amazing balance for the interactions with police as well, as when you crash in a pursuit, you are not able to immediately run...
I fly a lot actually, but each time I do i have a feeling that something might go wrong and i crash and die, other then psycological downsides tho, i dont feel bad physically