"Why don't they just put all the bad guys in jail or shoot them."
"Well son, you first have to find out who the bad guys are and then you have to prove they are bad."
Vaguely dissatisfying answer for the kid. The bad guys are obvious. They look like bad guys. They have the initials BG on their foreheads.
Engaging the painting - the very act of engagement is theory laden. That's true for the unitiated. That's true for me. It's true for you too. There's no such thing as raw engagement.
The work of art is more than half created by "the viewer" - but not each and every viewer. The "right" viewers have a tremendous influeunce on the rest of us - most of the time we aren't aware of it.
People bother to view the Mona Lisa because the right viewers have told them that's the thing to do.
I'm not arguing in favour of disengagement. At best, the only position I'd put forward is to practice not passing judgment, where possible.
Oliver Sacks' man who mistook his wife for a hat - here's an elegant example that all seeing is seeing as. He's unable to give correct interpretations of the colour patches he's seeing - but everything he sees is still an interpretation, based on previous experiences.
Every great artist knows who will be seeing his/her work and each one anticipates the reaction to it from that individual.
Van Meegeren anticipated the reaction from Bredius (read the book if interested). He deliberately chose to introduce his forgery to Bredius - one of the absolutely greatest experts on Vermeer - for a myriad of reasons - including having studied Bredius' earlier articles and earlier discoveries of hidden Vermeers - van Meegeren painted with the foreknowledge that Bredius would look for certain things to fit in with his overall theory.
Supper at Emmaus was considered so great that as the Boijmans Museum in Rotterdam was closing the deal, the government stepped in at the urging of the Rijksmuseum. They'd buy the Supper for the Rijksmuseum, being the nation's national museum, and as compensation for the Boijmans for all its hard work in attempting to keep the painting in The Netherlands, they offered from the Rijksmuseum a genuine small Vermeer and a ter Borch.
To their surprise, they were informed the deal had in fact been completed, and that they intended on keeping Supper. It's now the most sought after work in the Boijmans Museum (to the distress of the curator).
People don't want to see Supper just to see it. They don't want to engage it in any raw kind of way. They find the scandal delicious, and they marvel that people could be so mistaken.
I'm not sure who said your quote, but I do know you've said it before. It sounds a little like Picasso, who once claimed something to the effect that he had to unlearn how to paint.
Anyway - see those little things doesn't mean the painting works at all. Seeing the House of Parliament in a Monet doesn't mean you are seeing the fog. Seeing The Virgin in a Caravaggio doesn't mean you are seeing the "modern" Roman garb, or the fact that the model is a courtesan.
Seeing, by and large, in an uneducated way, is boring.