Hi,....you ask a very good question which goes to the heart of Art Education. I'm a gallery owner, and have heard you question asked hundreds of times.
I believe there is a battle going on in the mind of the viewer when they look at art. The fight is between intellect & emotion. Depending of how you are trained, by everyone from Mom & family right on through your second grade teacher, spouse or government, you will bring all this baggage with you as you stand before a work of art.
Realism is very satisfying to persons who like to relate to art without fighting to understand, while those "blobs" of paint connect the viewer to an emotional connection.
When a person actively utilizes BOTH connections, they can enjoy many art forms. This is why Jackson Pollack's drip paintings have aroused so much argument through the years. Pollacks work was not haphazardly done. In fact, he destroyed much of his work because it didn't meet his desire to create an overall "harmonious confusion" of color and design. They are better appreciated if you simply let your emotions take over.
Thanks for your question,...it got me thinking this morning!
Roger www.theframehopandgallery912.com