Utterly horrifying, but ultimately irrelevant. No lock of this size is meant to be anything other than inconvenient to open. Angle grinders are cheap, and more easily wielded than HTTP request crafting.
We had a similar thing a couple of years ago with bicycle locks (I'm Dutch). AXA, a well known manufacturer of locks offered a range of very sturdy bicycle locks. Hardened steel, almost impossible to crack open unless you spend some time with a big, noisy angle grinder. A lot of these locks were mandated by insurance companies, so they must be good, right?
Wrong. A lot of these locks could be opened in seconds with just a blank (uncut) key. Which you could buy in bulk and not very hard to get hold of...
Consider using it for your gym-locker. The changing room is typically occupied by at least some people whenever the gym is open so if someone is pulling out a bolt-cutter or an angle grinder it would probably lead to someone notifying the gym-employees/police. Meanwhile someone who just walks up to the lock and seemingly opens it must be legit and goes unnoticed.
If someone wants to get past my low-tech padlock, it will be inconvenient. They will have to spend some amount of time with either an angle grinder, bolt cutters, or lock picking tools. What they’re doing will be suspicious and will likely draw attention. If they’re caught during the trip to or away from my lock, the possession of any of these tools will be suspicious.
With this lock, all those weaknesses are the same. Expect now the lock-pick tools are replaced with an app, and there's nothing wonky at all about someone walking up to the lock, tapping on their phone, and removing it. If they're caught en route to or away from the location, they have nothing on them to incriminate.
This lock is strictly worse than a standard padlock, when it comes to security. All the flaws plus new ones.
This would allow for an attack where the lock appears to be operating successfully, but someone has unauthorised access.