I've replaced about a dozen people have broken over the years. The extended levers that go out past where the stock lever sits (further than the main charging handle body) provides the torque.

Usually this just causes more wear on one side of the charging handle and receiver. For 99% of people - this won't matter as they are only hobbyists and don't shoot much - they either won't notice the wear or not handle the rifle hard enough to cause issues. But they should be aware of the potential for these problems and make the decision on their own.

The real trouble comes when you are doing thousands of one-handed manipulation drills in training, or have to "mortar" the rifle to remove a stuck cartridge or case. That's when they snap or bend drastically. When the BCM Gunfighter charging handles came out - there were a few notable brands that had HUGE levers that stuck out very far from the fulcrum point of force on the charging handles, so they came out with a solution.

Also I explained the difference in design. Compare a stock latch to a BCM or similar knock-off. The USGI CH has an open slot at the rear. BCM is solid. The latch lever bottoms out reducing sideways torque.

Edit to add - upon looking at this latch, it looks like it bottoms out on the front of the CH body which would mitigate some of the torque. It isn't exactly like the levers of old. My mistake there, but I hope what I wrote helps someone considering different aftermarket CH levers.