That's quite a good point, that Alchemyst made about BTL chips being a VR experience.
VR just means, that you see (hear, smell, taste, feel) something that is not there. VR does not automatically mean experiencing the matrix in VR with wireless on.
A BTL chip lets you perceive how it is to be Attila the Hun (it's a simsense recording without safety measures, no matrix or wireless in there).
AFAIK you can steer a vehicle via Control Device in AR (a joystick is "projected" by your commlink/deck/RCC) or VR (you are sitting a room with as many joysticks, steering wheels, pedals as you wish or rather as the programmer of the operating system wished; back in SR4 the rating of a "Command" program gave a measure how good these control elements where designed). Again there is no matrix needed to let you sit in the virtual room full of control elements. In this case matrix access is needed to let you connect to the drone/vehicle/device you want to control, but it's not needed to let the virtual room be there.
Jumping in means, you become the vehicle, you see, feel etc. what your vehicle or rather its sensors see, feel, etc. For that you don't need Wireless on, if you are connected with a cable to your vehicle. With wireless off you will not see icons and hosts around you, but I'm not sure how many of those matrix things riggers want to see. I can imagine that a lot of rigger filter a lot of stuff, that's interesting for deckers, and that they only leave VR-Matrix-stuff on, that's helpful for driving (like traffic signs, infos about traffic-jams etc.).
So I see no problem with being VR and only connected via cable to your vehicle with wirless off.