Honestly, how? They provide the parts at a reasonable price and even provide the actual tooling they use to get something as close to OEM repair as possible. There are a lot of things faulty at Apple, but this is not one of them.
I rest my case.
> It's designed to scare people away from doing the repairs themselves.
I don't think the program is perfect, but I don't see how missing components scare people away.
You'll find 404 responses when you click on repair manual links; the link to the self service repair is at the bottom of the support page; the self service storefront is very deliberately non-descript and as others have mentioned immediately raises red flags for people trained to look for basic clues about a site's legitimacy. Etc.
The argument will be made that the "App Store" is there to protect you because security/privacy. And the DRM'd components are there to protect you from cheap chinese knockoffs. I think that's fine as long as it's opt-in.
But no, it's not for your protection - it's to control the market and drive the cost of repair higher so you will forced to buy a new phone more often. This is a blatant case of "OK you demanded right-to-repair, so let's show you how to make it as difficult as possible". It's not grudging - it's willful and spiteful.
Lastly, as I already pointed out in a sister comment, the grandparent said the program is designed to scare people away from repairing their phone. I actually don't see how. In fact, providing the tooling makes it more accessible than just providing the parts. I'd love to see everything replaceable, but this is a step in the right direction.