Some people seem to be taking it a little more confrontationally than seems necessary.
Think "let" as in "facilitate" rather than "permit". A step stool let's you reach a high shelf, but you don't need to ask it for permission.
They're providing 3d models they've done basic quality control on for some components of some devices.
It's 100% a sales tactic to increase their perceived value by creating the impression that repairs will be easier and so the thing will last longer. It just happens to be that the easiest way to do that is to actually do it.
For a long time, the One Blade was the only razor that didn't pull my hair. Then they changed how they made them and started pulling. I no longer use it.