I've struggled with this too. I want to only use my phone but the quiet focus that a view finder gives me allows better attention to detail, the edges of the photo, and subtle alignments of parallax objects. I find it much harder on a phone or with live view on a proper camera. It's like -- for a moment, I am the camera and I'm about to make a record of a moment. I don't get nearly that feeling with a phone despite years of trying to convince myself its the same