Ugh. Boke bottom plastic protective plate/guard/shield. How bad is it to drive?

It's a long term Uber rental. I really don't want to have to deal with bringing it back to the rental place if I don't have to.

I drove into a parking space that contained a watermelon sized snow chunk I thought I could plow over it. Turns out the snow was frozen harder than a fraggle rock and destroyed the bottom plastic covering like the titanic hitting an iceberg.

There's a hole or two. Water and salt is gonna get in there. How big of a deal is this?

 

I guess my question is... How important is that plastic guard? Is it like a regular car splash guard, or is it VERY IMPORTANT and protects all the electric parts from shorting out.