Because not enough people would buy it to justify the expense in time/money required to offer selling it? They probably don't even want to recommend people fix their own devices because people will try, screw up, and then go to support, and they'd have to train their support staff to handle this case.

If they give you the tools you need to void your warranty that sends a bit of a mixed signal.

And anyway, isn't it moot? https://www.amazon.com/dp/B00A0P3XUY/