It would be too easy to accidentally touch it with the bar if your descent is imbalanced which would lead to a disqualification. Seriously it won't ever be considered.
Won't ever be considered. Lol. Ok.
Look at the changes just in the last few years to make things safer.
It's also easy to accidentally touch the rack already.
I would have though making things safer, especially for bench, were you are under a bar with no way out would be considered and they have already been doing that.
Fuck powerlifters are a shitty fucking bunch when anyone suggests anything.