Everything they do is for more money.
Not user experience, not expediency of waterproofing. Just money.
Why they have itunes, different chargers, different os and things like this...
I hate iphones, they are terrible - I'm just so pissed off Samsung copied them with S6 (and I realised it after I got one... free... but still). You should be able to add memory (used to be able to on samsung til s6), you should be able to swap sims (could on samsung til s6) and the usb port should be universal (apple were sly cu nts in how they dodged eu law - they said universal chargers meant the bit that plugged into wall and got away with it

)...
Still, they make a shitload of money and my dad has a shitload of their shares so - go buy it.