I think I've really struck a cord here with this OP...
Mayank, my fellow Michigander, I've taken class's with David DeGroot when he was here at University of Michigan Botanical Gardens thru Ann Arbor Bonsai Society, he is a really talented guy re the so called Art of Bonsai, however.....To create a Forest Planting he started with several (maybe 6 or 8) small Starter tree's placed randomly in a 24" ceramic pot and then added some non descript Greenery and Moss, it took him about 30 minutes and any Grade schooler could have accomplished the same...
I'm not trying to run down David, he has work and experience way above the average Bonsai Pretender Wannabe, he also was Gardener in charge of a very large prestigious West Coast Facility....
In the Article you reference he does the Analogy of creating a Bonsai Tree to a Famous Sonata….as tho the Composer of the Sonata is on the same page as the Gardener.....Pluuuuuleeeeeese....