Why is Apple so dumb as to use aluminum?

First, this is for big time Apple guys. Why on Earth would you use a aluminum case for a phone? That is stupid! Aluminum is a malleable substance and can't take much force. People say it bends and breaks and I have seen the proof and scientific evidence why. You take a flat, huge object put a malleable substance around it and say it can't bend because of glass that supposedly can't break. Wow. If you want real crystal, go to Brazil and get real crystals for $10.00. Yes that is how much some of them are. I went there and bought some so if you want proof just ask. Apple should have done this: used stainless steel or graphene for a case. Then use Gorilla glass to perfect it. Done. No bending or breaking. Graphene, I realize, is expensive to make. However, pricing a 'bendable phone' at $700 is stupider than spongebob on drugs. Just saying. That was not meant to offend anybody btw. Also using a crystal display could bring down crystal value. Saphaire crystal is not strong at all when put on a screen. It bends. The whole phone bends. I feel sorry for iPhone 6 users that don't have Apple care. Who wants to pay once a month for a $700 phone! Apple care isn't cheap either. Apple screwd up big time. Just saying.

It's not pure aluminium it's an aluminium alloy. Why they didn't pick up the issue during testing is the real issue!

But it's light. Steel is heavy.

Actually aluminum is great, everyone else uses plastic. You have to actually try and go out of your way to bend it, which why would anyone be doing that… One good thing about Apple is they will fix even the smallest complaints, so you can bet they are changing it in the future to be some type of re-enforced metal while still keeping it thin and light.

I wonder why aircraft manufacturers use aluminium, or an alloy thereof? And are they afflicted with the same stupidity?

Why are you so dumb and not smart enough to answer that by yourself instead of criticizing companies? Let's say the company was dumb like how you said, why are they still not bankrupted and get a lot of money? Why do many people use iPhone?