They dont want you to fix them, much less fix them yourself. They want you to buy another or send it back to them to repair
I'm not surprised. Most of Samsung's devices are a pain to fix. If you crack your screen good luck repairing it without jacking it up. The components assembly is sealed to the digitizer/glass in most of their phones. I get it that having a thinner device means you need to make some sacrifices for assembly but its getting ridiculous.
I hate how people [censored] about not having a removable battery, you wouldn't need to replace the battery if it weren't so bad and how do you a expect an aluminum unibody to have a removable battery? There's a reason it's called a unibody and I don't think having an aluminum removable back would be such a good idea.
A warranty won't help you if you break your phone, you mean "insurance" is a good idea.