Apple can’t tell you what you can do, nor can you tell them to cover a phone under warranty after you do something to void the warranty. The problem here is? I don’t see a problem with a company putting on restrictive warranty terms and refusing to support any hacked up piece of software someone decided to install on their device.
But some people (apparently quite a few here on FR) don't understand the concept of "If you screw with it, you're on your own." It's not a tough concept, as you so well point out.
The fact is, Apple doesn't give a d@mn if you take a drill press to it. Just don't come back to them, whining that it doesn't work any more.
But you'd be astonished (and dismayed) at how many people "screw with" products, voiding their warranty, and then go back to the manufacturer and whine. Some even go so far as to sue. Un-be-freakin-lievable.
Our FRiend Moltke has the right idea -- if you don't like Apple's rules, don't play Apple's game. Buy somebody else's phone.
At least in that regard, it's still a free country.