Nice idea, but that looks like a pretty light duty aluminium piece.
If so, even a slightly off angle pull could damage it, if not cause it to fail, and sent it flying.
I've thought of that, too. BMW has two tow points on the front and back, but provides only the one aluminum hook. I've thought about getting a couple of something like this, and there's plenty of storage down by the spare tire:
https://www.amazon.com/DEWHEL-Alumi...ocphy=9016087&hvtargid=pla-571647253835&psc=1