Interesting. I’ve never seen this on their higher end cuts. On the cheaper cuts you can literally see the piercings. I actually found this out many years ago when preparing some lower end cut. It might have been when making jerky. If you look closely you can see it but you have to be looking for it to notice.
As for bacteria, I dont care. I’m going to die from something lol. If people want to eat well done steak, let them.