Caporegime
The woman in the photo with the baby looks much better all in focus rather than blurring out the background
Same with the back of the child actually. Makes the subject look superimposed by crazy blurring everything else out.
You are going to disagree but I am going to say it anyway.
The world is not perfect, the places you shoot is often not perfect, it is often untidy, cluttered, messy and ugly. By having the ability to isolate a subject an throw that background (mess) out of focus gives the photographer a tool to keep the photo "tidy".
Subconsciously, at least in my experience, the VAST majority of people prefer a clean uncluttered photo over a messy one. These things are never talked about, it is something you never notice, until I point it out, by able to make a photo cleaner, either by shallow DoF, or PS, is more pleasing to the eye.
Our eyes never see everything in focus anyway, it never has and never will. Having a photo everything in focus is actually unnatural. You only focus on the subject you are looking at, the things that you are not looking at are all out of focus. Yes, that is a fact, it's science. You probably never notice it because your eye adjust focus so fast.
So having a photo entirely in focus is technically "fake", and why it doesn't look so pleasing to the vast majority of people, mainly because it is not what their eyes see.