I don't think it is so much about if we don't value the industry, no one will. The big take away from the article is definitely understand your business and what it cost to run the business. REAL costs! So many people don't have a firm grasp on the costs of running a business and even those of us who do can slip from time to time. As a case in point I was working on our 2015 budget last month (non photography business) and was shocked to see that we were averaging $6,000 a year in office supplies. I went to my purchaser and questioned him telling him that $6k a year was completely out of line. In response he was able to lay out perfectly reasonable expenses and I was shocked to see they totaled just under $6k. When I say it now it is still hard to believe but the facts are the facts.
Memories - I am curious have you ever logged every minute you spent on e-mail / phone / conversation with a client? I can't say for sure if 3 hours is way to much or way to little, the only way to really know is a time study. There are a number of cell phone apps that would allow just such a study. (not trying to argue, just curious as I am considering part time photography)
I was on a friends page this morning and was shocked to see that he charges $30.00 for a portrait session. This guy is a full time photographer and someone who I would consider to be good at his craft. He sells all of his prints and digital a la carte but I wonder what happens when he does a shoot and the customer buys little or nothing. The way I see it best case he has a minimum of 2 hours invested between contact, shooting, processing, uploading, etc.
Bottom line in any business - know your TRUE costs.