I will try.
Photo enthusiast had two options back in films times.
1. He took his exposed films to a lab, putting everything under control of operator (alas, very often non-photographer, uncaring and lazy guy), hoping that the lab would not spoil the film and prints... The result? 50/50 You could come out happy or unhappy.
2. Darkroom. In pre-lab times this option was for everyone, in post-lab times it was mostly a choice for professionals. In darkroom (your own lab) photographer developed his films himself, making any corrections he wanted, and then he printed cards himself. All control over the process was in his hands, everything depended on his skills.
Now you can rely on lab as well. And with modern technology 70% of shots are ready to print or publish with minimum corrections and editing. But that rest 30% of your shots are usually those, where you think you found something new, interesting and genius And you don't want anybody touch that file. So you need Photo Shop - the dark room of ourdays. Your own photolab, where you can do whatever you want with your photos, and again, the result depends only on your skills.
I hope it makes some sense...