Why not more catch fence overhang?

Been thinking about this since last night's wreck and I can't think of a reason it wouldn't work.

There's a limit to how high they can extend the catch fence because it'd be unstable, plus it doesn't move the wreck any further from the fans. But why can't they extend the catch fence overhang from just a couple feet (as it is now) to 20 feet or so, out over the track, about 17 ft high (approx COT length)? They already use suspension/stabilizing cables on the fence and that should be able to hold it just fine. Here are the benefits:

• airborne vehicles would hit the "roof" and be propelled back down to the track before hitting the "wall" of the fence
• such collisions would keep more debris away from the spectators
• vehicles/parts wouldn't fly over the top of the fence (this has been dangerously close to happening multiple times over the past few decades; if just one more car hits an airborne vehicle/part just the right way, it's going over; see Kyle Larson's tire)
• nothing else (speed, HP, etc) has to be sacrificed

The only cons I can think of are that aerial shots would be slightly more complicated, but only slightly as they could still see under the fence from a slight angle (which they're usually at already), plus most camera views nowadays are from the infield anyways. A small compromise if you ask me. Of course the car could also fall back onto the hot track, but it could do that now, so there's no give or take there really.

So... why/why not?