You're right, your DSLR would have taken a better-quality photo. But would you have had your DSLR with you in those situations? I would put money on you not carrying your DSLR with you at all times. Sure the iPhone doesn't have the quality as a DSLR, but it's not a bad substitute for when you see something to shoot and you don't have your DSLR with you. Better to take the photo on an iPhone than not at all, right? Would you not take a picture on your iPhone, when you have nothing else to shoot with, just because it's not up to DSLR quality? In fact, if you hadn't been told they were taken on an iPhone, would you have been able to say that they were?
Alex
I have a camera handy any time I want to make photos. Regarding the quality, those photos are poor quality. Whether I'd know they were taken with an iPhone is irrelevant. I know they're taken with an inferior device. I don't understand why you can't see the obvious deficiencies, because they're NOT subtle.