We've had this discussion before and I really do not want to rehash it.

Expensive locks can and will be cut/drilled out (send a private message to the locksmith guy and ask how easy it is to drill out a high end u-lock) if the thief has an opportunity and a motive. 3 minutes with a portable angle grinder or a portable drill is all it takes. If one can make a few hundred bucks with a 1/2 hour of work, they'll do it even if it's risky. You're familiar with a concept called "crime" right?

What is so hard about grasping that even high-rated and expensive locks can be defeated and are being defeated in major cities?