Certainly, some people do have problems with the wires at times. I've never felt them, even when I stretch or twist quickly. It's quite a small percentage who have the problem, but if it's you that hurts, I don't suppose that would make you feel any better.
Sometimes, people confuse attacks of costochondritis with pain from the wires. It causes exquisitely sharp pains, but is actually mostly about tiny muscles charley-horsing, and nerves going off like alarm clocks.
Consider how ticklish most people are in their ribs. That's because there are so many nerves there. The only suggestion I could make to avoid rib pain problems as much as possible is to make sure you move while you heal (to paraphrase Satchel Paige, 'Sort of jangle around while you walk'). I believe it takes movement and gentle stretching to assure the tiny muscles and tendons get properly realigned and "fit back together" properly. Of course, even that wouldn't work for everybody.
Again, most of us don't feel the wires at all. Even strong magnets don't work on me, by the way. Stainless steel isn't quite as magnetic as regular steel, due to its nickel content. However, I just tried a stainless steel scissors and a stainless steel butter knife on my pegboard tool magnet, and both stuck solidly. So, I guess we walk under those construction crane magnets at our own risk.
They must show up vividly in an MRI.
Best wishes,