I don't mean the items listed below aren't ABLE to be upgraded, I'm saying they cannot be upgraded because there are no instructions on HOW.
You mean this? That's a contradiction. Just check the verbs.
No that's called you have no comprehension it's worded perfectly fine for the context it's used in. Try going back to school.
Something that's Able to be done (Which means it's possible) doesn't mean it CAN be done (Can in this context means to succeed).
So that context that sentence is in, actually says this:
Just because something has the possibly of being done, doesn't mean you will actually be able to do it.
Again go back to school because you somehow think words only have one way of being used.