> for that you need at least a viewfinder/rangefinder to compose a good shot and a physical shutter button to take a bunch quickly and choose the best one later.

I don't know if I agree with this. I've taken some great pictures on vacations, and with friends and family using my phone. I have some of these framed around the house.

I don't think the average person is capable (or really cares that much) about getting the perfect composition. For these people, a phone is a great substitue to a compact camera that would have been used 10+ years ago.

Oh, also most phones have a burst mode that works great.