They make the phones thinner presumably because people want thinner phones.
They want to be as thin as the competition. And as fast. And have as long battery time. And they are all related obviously.
They kind of are, but the relationship is the wrong way around. Thinness is inversely correlated with battery life, a thicker phone has room for a bigger battery. Thinness also constrains your heat dissipation options, making it more difficult to drive the CPU/GPU at high clock speeds.
My phone lives, alone, in my left front pocket. I'd much rather have the benefits of a thicc phone than maximize thinness.
