I just think the companies are delivering the equivalent of a baby with no skin and a tiny stomach. It's a precious thing you want to hold every day, but it doesn't come with even basic outer protections from damage, and it can't stomach enough food to produce the energy it needs to live throughout the day. BUT, Johnson and Johnson (inventor of babies) will be glad to sell you a silicone baby skin or the waterproof baby case. And there's Ultra-Tum®-- a stomach addon with normal baby-stomach capacity to keep your little tyke chugging along all day! Like, bitch, just make a damn baby with skin and a normally sized stomach!
Obviously the above is hyperbole (and I'm trying to do my best Keaton Patti impression), but I really think the designers are in a special position where they're the best-suited party to just make a damn phone with a case built in and a high-capacity battery, even at the cost of sleekness.