If you want to survey the variety of what part of photography is most important to each of us, that is fundamentally different than asking us what constitutes the (single) essence of photography.
Again, there is no such thing as a "(single) essence of photography." Which is why I posted various related quotes from acknowledged leaders in the field before stating my own version of the essence. Its poetic. Everyone will have their own experience and distill their own essence. Just read the histories of the great photographers and photography critics to understand that.
And I am not really asking, "what part of photography is most important to you?" That's a different
kind of question. I was trying to strip out the nonsense about cameras and printers and softwares and sensors and genres, and get down to what is generally known as "essence."
Now, obviously many just flat out didn't understand what was meant by essence. But, even after many attempts to explain it, the bulk of the rebuttals were arguments against the idea of asking the question! Off base by a mile.
It wasn't hard. It wasn't controversial. I've asked similar questions to hundreds of people about various ideas. "George, what's the essence of the Constitution?" George will have an answer, no problem. "Harry, what's the essence of your obsession to collect bottle caps?" Harry has no trouble with an answer. It just isn't a controversial question.
If I thought the essence of photography was
making light hit a sensitive surface, I would have taken up knitting. But the first time I took pictures, I could see the potential in how the paper object itself made myself and others react in new ways. I was seeing in a different way than normal vision and that difference was clearly useful.