You may assume the worst, if it makes you happier to be unhappy. I don't see any reason to.
As noted, large companies have lots of patents that they never use. This could very well be one of them. Of the half-dozen patent applications I've been listed on at two companies, only one is for something the company actually did - the others were just ideas I convinced a committee might be interesting someday.
Even if Apple did use it, they could use it for exactly the purposes described in the patent - to protect the device owner from theft and hacking. I think a lot of owners would actually like that (like my sister-in-law who had a major hassle undoing charges run up by someone who stole her phone).
I dislike the walled garden model that Apple chooses to base its business on, but I honestly don't see evil and conspiracy here. As I also said, they could have done all this without a patent, so getting the patent means nothing, except that they might have a monopoly on this kind of control. That wouldn't be a very useful monopoly unless, say, people find it a selling point.